Tavole della normale standardizzata

    
              Area al di  Area da      Area
   z          sotto di z   z a 0       sopra z
-3.50        .0002        .4998        .9998
-3.49        .0002        .4998        .9998
-3.48        .0003        .4997        .9997
-3.47        .0003        .4997        .9997
-3.46        .0003        .4997        .9997
-3.45        .0003        .4997        .9997
-3.44        .0003        .4997        .9997
-3.43        .0003        .4997        .9997
-3.42        .0003        .4997        .9997
-3.41        .0003        .4997        .9997
-3.40        .0003        .4997        .9997
-3.39        .0003        .4997        .9997
-3.38        .0004        .4996        .9996
-3.37        .0004        .4996        .9996
-3.36        .0004        .4996        .9996
-3.35        .0004        .4996        .9996
-3.34        .0004        .4996        .9996
-3.33        .0004        .4996        .9996
-3.32        .0005        .4995        .9995
-3.31        .0005        .4995        .9995
-3.30        .0005        .4995        .9995
-3.29        .0005        .4995        .9995
-3.28        .0005        .4995        .9995
-3.27        .0005        .4995        .9995
-3.26        .0006        .4994        .9994
-3.25        .0006        .4994        .9994
-3.24        .0006        .4994        .9994
-3.23        .0006        .4994        .9994
-3.22        .0006        .4994        .9994
-3.21        .0007        .4993        .9993
-3.20        .0007        .4993        .9993
-3.19        .0007        .4993        .9993
-3.18        .0007        .4993        .9993
-3.17        .0008        .4992        .9992
-3.16        .0008        .4992        .9992
-3.15        .0008        .4992        .9992
-3.14        .0008        .4992        .9992
-3.13        .0009        .4991        .9991
-3.12        .0009        .4991        .9991
-3.11        .0009        .4991        .9991
-3.10        .0010        .4990        .9990
-3.09        .0010        .4990        .9990
-3.08        .0010        .4990        .9990
-3.07        .0011        .4989        .9989
-3.06        .0011        .4989        .9989
-3.05        .0011        .4989        .9989
-3.04        .0012        .4988        .9988
-3.03        .0012        .4988        .9988
-3.02        .0013        .4987        .9987
-3.01        .0013        .4987        .9987
-3.00        .0013        .4987        .9987
-2.99        .0014        .4986        .9986
-2.98        .0014        .4986        .9986
-2.97        .0015        .4985        .9985
-2.96        .0015        .4985        .9985
-2.95        .0016        .4984        .9984
-2.94        .0016        .4984        .9984
-2.93        .0017        .4983        .9983
-2.92        .0018        .4982        .9982
-2.91        .0018        .4982        .9982
-2.90        .0019        .4981        .9981
-2.89        .0019        .4981        .9981
-2.88        .0020        .4980        .9980
-2.87        .0021        .4979        .9979
-2.86        .0021        .4979        .9979
-2.85        .0022        .4978        .9978
-2.84        .0023        .4977        .9977
-2.83        .0023        .4977        .9977
-2.82        .0024        .4976        .9976
-2.81        .0025        .4975        .9975
-2.80        .0026        .4974        .9974
-2.79        .0026        .4974        .9974
-2.78        .0027        .4973        .9973
-2.77        .0028        .4972        .9972
-2.76        .0029        .4971        .9971
-2.75        .0030        .4970        .9970
-2.74        .0031        .4969        .9969
-2.73        .0032        .4968        .9968
-2.72        .0033        .4967        .9967
-2.71        .0034        .4966        .9966
-2.70        .0035        .4965        .9965
-2.69        .0036        .4964        .9964
-2.68        .0037        .4963        .9963
-2.67        .0038        .4962        .9962
-2.66        .0039        .4961        .9961
-2.65        .0040        .4960        .9960
-2.64        .0041        .4959        .9959
-2.63        .0043        .4957        .9957
-2.62        .0044        .4956        .9956
-2.61        .0045        .4955        .9955
-2.60        .0047        .4953        .9953
-2.59        .0048        .4952        .9952
-2.58        .0049        .4951        .9951
-2.57        .0051        .4949        .9949
-2.56        .0052        .4948        .9948
-2.55        .0054        .4946        .9946
-2.54        .0055        .4945        .9945
-2.53        .0057        .4943        .9943
-2.52        .0059        .4941        .9941
-2.51        .0060        .4940        .9940
-2.50        .0062        .4938        .9938
-2.49        .0064        .4936        .9936
-2.48        .0066        .4934        .9934
-2.47        .0068        .4932        .9932
-2.46        .0069        .4931        .9931
-2.45        .0071        .4929        .9929
-2.44        .0073        .4927        .9927
-2.43        .0075        .4925        .9925
-2.42        .0078        .4922        .9922
-2.41        .0080        .4920        .9920
-2.40        .0082        .4918        .9918
-2.39        .0084        .4916        .9916
-2.38        .0087        .4913        .9913
-2.37        .0089        .4911        .9911
-2.36        .0091        .4909        .9909
-2.35        .0094        .4906        .9906
-2.34        .0096        .4904        .9904
-2.33        .0099        .4901        .9901
-2.32        .0102        .4898        .9898
-2.31        .0104        .4896        .9896
-2.30        .0107        .4893        .9893
-2.29        .0110        .4890        .9890
-2.28        .0113        .4887        .9887
-2.27        .0116        .4884        .9884
-2.26        .0119        .4881        .9881
-2.25        .0122        .4878        .9878
-2.24        .0125        .4875        .9875
-2.23        .0129        .4871        .9871
-2.22        .0132        .4868        .9868
-2.21        .0136        .4864        .9864
-2.20        .0139        .4861        .9861
-2.19        .0143        .4857        .9857
-2.18        .0146        .4854        .9854
-2.17        .0150        .4850        .9850
-2.16        .0154        .4846        .9846
-2.15        .0158        .4842        .9842
-2.14        .0162        .4838        .9838
-2.13        .0166        .4834        .9834
-2.12        .0170        .4830        .9830
-2.11        .0174        .4826        .9826
-2.10        .0179        .4821        .9821
-2.09        .0183        .4817        .9817
-2.08        .0188        .4812        .9812
-2.07        .0192        .4808        .9808
-2.06        .0197        .4803        .9803
-2.05        .0202        .4798        .9798
-2.04        .0207        .4793        .9793
-2.03        .0212        .4788        .9788
-2.02        .0217        .4783        .9783
-2.01        .0222        .4778        .9778
-2.00        .0228        .4772        .9772
-1.99        .0233        .4767        .9767
-1.98        .0239        .4761        .9761
-1.97        .0244        .4756        .9756
-1.96        .0250        .4750        .9750
-1.95        .0256        .4744        .9744
-1.94        .0262        .4738        .9738
-1.93        .0268        .4732        .9732
-1.92        .0274        .4726        .9726
-1.91        .0281        .4719        .9719
-1.90        .0287        .4713        .9713
-1.89        .0294        .4706        .9706
-1.88        .0301        .4699        .9699
-1.87        .0307        .4693        .9693
-1.86        .0314        .4686        .9686
-1.85        .0322        .4678        .9678
-1.84        .0329        .4671        .9671
-1.83        .0336        .4664        .9664
-1.82        .0344        .4656        .9656
-1.81        .0351        .4649        .9649
-1.80        .0359        .4641        .9641
-1.79        .0367        .4633        .9633
-1.78        .0375        .4625        .9625
-1.77        .0384        .4616        .9616
-1.76        .0392        .4608        .9608
-1.75        .0401        .4599        .9599
-1.74        .0409        .4591        .9591
-1.73        .0418        .4582        .9582
-1.72        .0427        .4573        .9573
-1.71        .0436        .4564        .9564
-1.70        .0446        .4554        .9554
-1.69        .0455        .4545        .9545
-1.68        .0465        .4535        .9535
-1.67        .0475        .4525        .9525
-1.66        .0485        .4515        .9515
-1.65        .0495        .4505        .9505
-1.64        .0505        .4495        .9495
-1.63        .0516        .4484        .9484
-1.62        .0526        .4474        .9474
-1.61        .0537        .4463        .9463
-1.60        .0548        .4452        .9452
-1.59        .0559        .4441        .9441
-1.58        .0571        .4429        .9429
-1.57        .0582        .4418        .9418
-1.56        .0594        .4406        .9406
-1.55        .0606        .4394        .9394
-1.54        .0618        .4382        .9382
-1.53        .0630        .4370        .9370
-1.52        .0643        .4357        .9357
-1.51        .0655        .4345        .9345
-1.50        .0668        .4332        .9332
-1.49        .0681        .4319        .9319
-1.48        .0694        .4306        .9306
-1.47        .0708        .4292        .9292
-1.46        .0721        .4279        .9279
-1.45        .0735        .4265        .9265
-1.44        .0749        .4251        .9251
-1.43        .0764        .4236        .9236
-1.42        .0778        .4222        .9222
-1.41        .0793        .4207        .9207
-1.40        .0808        .4192        .9192
-1.39        .0823        .4177        .9177
-1.38        .0838        .4162        .9162
-1.37        .0853        .4147        .9147
-1.36        .0869        .4131        .9131
-1.35        .0885        .4115        .9115
-1.34        .0901        .4099        .9099
-1.33        .0918        .4082        .9082
-1.32        .0934        .4066        .9066
-1.31        .0951        .4049        .9049
-1.30        .0968        .4032        .9032
-1.29        .0985        .4015        .9015
-1.28        .1003        .3997        .8997
-1.27        .1020        .3980        .8980
-1.26        .1038        .3962        .8962
-1.25        .1056        .3944        .8944
-1.24        .1075        .3925        .8925
-1.23        .1093        .3907        .8907
-1.22        .1112        .3888        .8888
-1.21        .1131        .3869        .8869
-1.20        .1151        .3849        .8849
-1.19        .1170        .3830        .8830
-1.18        .1190        .3810        .8810
-1.17        .1210        .3790        .8790
-1.16        .1230        .3770        .8770
-1.15        .1251        .3749        .8749
-1.14        .1271        .3729        .8729
-1.13        .1292        .3708        .8708
-1.12        .1314        .3686        .8686
-1.11        .1335        .3665        .8665
-1.10        .1357        .3643        .8643
-1.09        .1379        .3621        .8621
-1.08        .1401        .3599        .8599
-1.07        .1423        .3577        .8577
-1.06        .1446        .3554        .8554
-1.05        .1469        .3531        .8531
-1.04        .1492        .3508        .8508
-1.03        .1515        .3485        .8485
-1.02        .1539        .3461        .8461
-1.01        .1562        .3438        .8438
-1.00        .1587        .3413        .8413
 -.99        .1611        .3389        .8389
 -.98        .1635        .3365        .8365
 -.97        .1660        .3340        .8340
 -.96        .1685        .3315        .8315
 -.95        .1711        .3289        .8289
 -.94        .1736        .3264        .8264
 -.93        .1762        .3238        .8238
 -.92        .1788        .3212        .8212
 -.91        .1814        .3186        .8186
 -.90        .1841        .3159        .8159
 -.89        .1867        .3133        .8133
 -.88        .1894        .3106        .8106
 -.87        .1922        .3078        .8078
 -.86        .1949        .3051        .8051
 -.85        .1977        .3023        .8023
 -.84        .2005        .2995        .7995
 -.83        .2033        .2967        .7967
 -.82        .2061        .2939        .7939
 -.81        .2090        .2910        .7910
 -.80        .2119        .2881        .7881
 -.79        .2148        .2852        .7852
 -.78        .2177        .2823        .7823
 -.77        .2206        .2794        .7794
 -.76        .2236        .2764        .7764
 -.75        .2266        .2734        .7734
 -.74        .2297        .2703        .7703
 -.73        .2327        .2673        .7673
 -.72        .2358        .2642        .7642
 -.71        .2389        .2611        .7611
 -.70        .2420        .2580        .7580
 -.69        .2451        .2549        .7549
 -.68        .2483        .2517        .7517
 -.67        .2514        .2486        .7486
 -.66        .2546        .2454        .7454
 -.65        .2578        .2422        .7422
 -.64        .2611        .2389        .7389
 -.63        .2643        .2357        .7357
 -.62        .2676        .2324        .7324
 -.61        .2709        .2291        .7291
 -.60        .2743        .2257        .7257
 -.59        .2776        .2224        .7224
 -.58        .2810        .2190        .7190
 -.57        .2843        .2157        .7157
 -.56        .2877        .2123        .7123
 -.55        .2912        .2088        .7088
 -.54        .2946        .2054        .7054
 -.53        .2981        .2019        .7019
 -.52        .3015        .1985        .6985
 -.51        .3050        .1950        .6950
 -.50        .3085        .1915        .6915
 -.49        .3121        .1879        .6879
 -.48        .3156        .1844        .6844
 -.47        .3192        .1808        .6808
 -.46        .3228        .1772        .6772
 -.45        .3264        .1736        .6736
 -.44        .3300        .1700        .6700
 -.43        .3336        .1664        .6664
 -.42        .3372        .1628        .6628
 -.41        .3409        .1591        .6591
 -.40        .3446        .1554        .6554
 -.39        .3483        .1517        .6517
 -.38        .3520        .1480        .6480
 -.37        .3557        .1443        .6443
 -.36        .3594        .1406        .6406
 -.35        .3632        .1368        .6368
 -.34        .3669        .1331        .6331
 -.33        .3707        .1293        .6293
 -.32        .3745        .1255        .6255
 -.31        .3783        .1217        .6217
 -.30        .3821        .1179        .6179
 -.29        .3859        .1141        .6141
 -.28        .3897        .1103        .6103
 -.27        .3936        .1064        .6064
 -.26        .3974        .1026        .6026
 -.25        .4013        .0987        .5987
 -.24        .4052        .0948        .5948
 -.23        .4090        .0910        .5910
 -.22        .4129        .0871        .5871
 -.21        .4168        .0832        .5832
 -.20        .4207        .0793        .5793
 -.19        .4247        .0753        .5753
 -.18        .4286        .0714        .5714
 -.17        .4325        .0675        .5675
 -.16        .4364        .0636        .5636
 -.15        .4404        .0596        .5596
 -.14        .4443        .0557        .5557
 -.13        .4483        .0517        .5517
 -.12        .4522        .0478        .5478
 -.11        .4562        .0438        .5438
 -.10        .4602        .0398        .5398
 -.09        .4641        .0359        .5359
 -.08        .4681        .0319        .5319
 -.07        .4721        .0279        .5279
 -.06        .4761        .0239        .5239
 -.05        .4801        .0199        .5199
 -.04        .4840        .0160        .5160
 -.03        .4880        .0120        .5120
 -.02        .4920        .0080        .5080
 -.01        .4960        .0040        .5040
  .00        .5000        .0000        .5000
  .01        .5040        .0040        .4960
  .02        .5080        .0080        .4920
  .03        .5120        .0120        .4880
  .04        .5160        .0160        .4840
  .05        .5199        .0199        .4801
  .06        .5239        .0239        .4761
  .07        .5279        .0279        .4721
  .08        .5319        .0319        .4681
  .09        .5359        .0359        .4641
  .10        .5398        .0398        .4602
  .11        .5438        .0438        .4562
  .12        .5478        .0478        .4522
  .13        .5517        .0517        .4483
  .14        .5557        .0557        .4443
  .15        .5596        .0596        .4404
  .16        .5636        .0636        .4364
  .17        .5675        .0675        .4325
  .18        .5714        .0714        .4286
  .19        .5753        .0753        .4247
  .20        .5793        .0793        .4207
  .21        .5832        .0832        .4168
  .22        .5871        .0871        .4129
  .23        .5910        .0910        .4090
  .24        .5948        .0948        .4052
  .25        .5987        .0987        .4013
  .26        .6026        .1026        .3974
  .27        .6064        .1064        .3936
  .28        .6103        .1103        .3897
  .29        .6141        .1141        .3859
  .30        .6179        .1179        .3821
  .31        .6217        .1217        .3783
  .32        .6255        .1255        .3745
  .33        .6293        .1293        .3707
  .34        .6331        .1331        .3669
  .35        .6368        .1368        .3632
  .36        .6406        .1406        .3594
  .37        .6443        .1443        .3557
  .38        .6480        .1480        .3520
  .39        .6517        .1517        .3483
  .40        .6554        .1554        .3446
  .41        .6591        .1591        .3409
  .42        .6628        .1628        .3372
  .43        .6664        .1664        .3336
  .44        .6700        .1700        .3300
  .45        .6736        .1736        .3264
  .46        .6772        .1772        .3228
  .47        .6808        .1808        .3192
  .48        .6844        .1844        .3156
  .49        .6879        .1879        .3121
  .50        .6915        .1915        .3085
  .51        .6950        .1950        .3050
  .52        .6985        .1985        .3015
  .53        .7019        .2019        .2981
  .54        .7054        .2054        .2946
  .55        .7088        .2088        .2912
  .56        .7123        .2123        .2877
  .57        .7157        .2157        .2843
  .58        .7190        .2190        .2810
  .59        .7224        .2224        .2776
  .60        .7257        .2257        .2743
  .61        .7291        .2291        .2709
  .62        .7324        .2324        .2676
  .63        .7357        .2357        .2643
  .64        .7389        .2389        .2611
  .65        .7422        .2422        .2578
  .66        .7454        .2454        .2546
  .67        .7486        .2486        .2514
  .68        .7517        .2517        .2483
  .69        .7549        .2549        .2451
  .70        .7580        .2580        .2420
  .71        .7611        .2611        .2389
  .72        .7642        .2642        .2358
  .73        .7673        .2673        .2327
  .74        .7703        .2703        .2297
  .75        .7734        .2734        .2266
  .76        .7764        .2764        .2236
  .77        .7794        .2794        .2206
  .78        .7823        .2823        .2177
  .79        .7852        .2852        .2148
  .80        .7881        .2881        .2119
  .81        .7910        .2910        .2090
  .82        .7939        .2939        .2061
  .83        .7967        .2967        .2033
  .84        .7995        .2995        .2005
  .85        .8023        .3023        .1977
  .86        .8051        .3051        .1949
  .87        .8078        .3078        .1922
  .88        .8106        .3106        .1894
  .89        .8133        .3133        .1867
  .90        .8159        .3159        .1841
  .91        .8186        .3186        .1814
  .92        .8212        .3212        .1788
  .93        .8238        .3238        .1762
  .94        .8264        .3264        .1736
  .95        .8289        .3289        .1711
  .96        .8315        .3315        .1685
  .97        .8340        .3340        .1660
  .98        .8365        .3365        .1635
  .99        .8389        .3389        .1611
 1.00        .8413        .3413        .1587
 1.01        .8438        .3438        .1562
 1.02        .8461        .3461        .1539
 1.03        .8485        .3485        .1515
 1.04        .8508        .3508        .1492
 1.05        .8531        .3531        .1469
 1.06        .8554        .3554        .1446
 1.07        .8577        .3577        .1423
 1.08        .8599        .3599        .1401
 1.09        .8621        .3621        .1379
 1.10        .8643        .3643        .1357
 1.11        .8665        .3665        .1335
 1.12        .8686        .3686        .1314
 1.13        .8708        .3708        .1292
 1.14        .8729        .3729        .1271
 1.15        .8749        .3749        .1251
 1.16        .8770        .3770        .1230
 1.17        .8790        .3790        .1210
 1.18        .8810        .3810        .1190
 1.19        .8830        .3830        .1170
 1.20        .8849        .3849        .1151
 1.21        .8869        .3869        .1131
 1.22        .8888        .3888        .1112
 1.23        .8907        .3907        .1093
 1.24        .8925        .3925        .1075
 1.25        .8944        .3944        .1056
 1.26        .8962        .3962        .1038
 1.27        .8980        .3980        .1020
 1.28        .8997        .3997        .1003
 1.29        .9015        .4015        .0985
 1.30        .9032        .4032        .0968
 1.31        .9049        .4049        .0951
 1.32        .9066        .4066        .0934
 1.33        .9082        .4082        .0918
 1.34        .9099        .4099        .0901
 1.35        .9115        .4115        .0885
 1.36        .9131        .4131        .0869
 1.37        .9147        .4147        .0853
 1.38        .9162        .4162        .0838
 1.39        .9177        .4177        .0823
 1.40        .9192        .4192        .0808
 1.41        .9207        .4207        .0793
 1.42        .9222        .4222        .0778
 1.43        .9236        .4236        .0764
 1.44        .9251        .4251        .0749
 1.45        .9265        .4265        .0735
 1.46        .9279        .4279        .0721
 1.47        .9292        .4292        .0708
 1.48        .9306        .4306        .0694
 1.49        .9319        .4319        .0681
 1.50        .9332        .4332        .0668
 1.51        .9345        .4345        .0655
 1.52        .9357        .4357        .0643
 1.53        .9370        .4370        .0630
 1.54        .9382        .4382        .0618
 1.55        .9394        .4394        .0606
 1.56        .9406        .4406        .0594
 1.57        .9418        .4418        .0582
 1.58        .9429        .4429        .0571
 1.59        .9441        .4441        .0559
 1.60        .9452        .4452        .0548
 1.61        .9463        .4463        .0537
 1.62        .9474        .4474        .0526
 1.63        .9484        .4484        .0516
 1.64        .9495        .4495        .0505
 1.65        .9505        .4505        .0495
 1.66        .9515        .4515        .0485
 1.67        .9525        .4525        .0475
 1.68        .9535        .4535        .0465
 1.69        .9545        .4545        .0455
 1.70        .9554        .4554        .0446
 1.71        .9564        .4564        .0436
 1.72        .9573        .4573        .0427
 1.73        .9582        .4582        .0418
 1.74        .9591        .4591        .0409
 1.75        .9599        .4599        .0401
 1.76        .9608        .4608        .0392
 1.77        .9616        .4616        .0384
 1.78        .9625        .4625        .0375
 1.79        .9633        .4633        .0367
 1.80        .9641        .4641        .0359
 1.81        .9649        .4649        .0351
 1.82        .9656        .4656        .0344
 1.83        .9664        .4664        .0336
 1.84        .9671        .4671        .0329
 1.85        .9678        .4678        .0322
 1.86        .9686        .4686        .0314
 1.87        .9693        .4693        .0307
 1.88        .9699        .4699        .0301
 1.89        .9706        .4706        .0294
 1.90        .9713        .4713        .0287
 1.91        .9719        .4719        .0281
 1.92        .9726        .4726        .0274
 1.93        .9732        .4732        .0268
 1.94        .9738        .4738        .0262
 1.95        .9744        .4744        .0256
 1.96        .9750        .4750        .0250
 1.97        .9756        .4756        .0244
 1.98        .9761        .4761        .0239
 1.99        .9767        .4767        .0233
 2.00        .9772        .4772        .0228
 2.01        .9778        .4778        .0222
 2.02        .9783        .4783        .0217
 2.03        .9788        .4788        .0212
 2.04        .9793        .4793        .0207
 2.05        .9798        .4798        .0202
 2.06        .9803        .4803        .0197
 2.07        .9808        .4808        .0192
 2.08        .9812        .4812        .0188
 2.09        .9817        .4817        .0183
 2.10        .9821        .4821        .0179
 2.11        .9826        .4826        .0174
 2.12        .9830        .4830        .0170
 2.13        .9834        .4834        .0166
 2.14        .9838        .4838        .0162
 2.15        .9842        .4842        .0158
 2.16        .9846        .4846        .0154
 2.17        .9850        .4850        .0150
 2.18        .9854        .4854        .0146
 2.19        .9857        .4857        .0143
 2.20        .9861        .4861        .0139
 2.21        .9864        .4864        .0136
 2.22        .9868        .4868        .0132
 2.23        .9871        .4871        .0129
 2.24        .9875        .4875        .0125
 2.25        .9878        .4878        .0122
 2.26        .9881        .4881        .0119
 2.27        .9884        .4884        .0116
 2.28        .9887        .4887        .0113
 2.29        .9890        .4890        .0110
 2.30        .9893        .4893        .0107
 2.31        .9896        .4896        .0104
 2.32        .9898        .4898        .0102
 2.33        .9901        .4901        .0099
 2.34        .9904        .4904        .0096
 2.35        .9906        .4906        .0094
 2.36        .9909        .4909        .0091
 2.37        .9911        .4911        .0089
 2.38        .9913        .4913        .0087
 2.39        .9916        .4916        .0084
 2.40        .9918        .4918        .0082
 2.41        .9920        .4920        .0080
 2.42        .9922        .4922        .0078
 2.43        .9925        .4925        .0075
 2.44        .9927        .4927        .0073
 2.45        .9929        .4929        .0071
 2.46        .9931        .4931        .0069
 2.47        .9932        .4932        .0068
 2.48        .9934        .4934        .0066
 2.49        .9936        .4936        .0064
 2.50        .9938        .4938        .0062
 2.51        .9940        .4940        .0060
 2.52        .9941        .4941        .0059
 2.53        .9943        .4943        .0057
 2.54        .9945        .4945        .0055
 2.55        .9946        .4946        .0054
 2.56        .9948        .4948        .0052
 2.57        .9949        .4949        .0051
 2.58        .9951        .4951        .0049
 2.59        .9952        .4952        .0048
 2.60        .9953        .4953        .0047
 2.61        .9955        .4955        .0045
 2.62        .9956        .4956        .0044
 2.63        .9957        .4957        .0043
 2.64        .9959        .4959        .0041
 2.65        .9960        .4960        .0040
 2.66        .9961        .4961        .0039
 2.67        .9962        .4962        .0038
 2.68        .9963        .4963        .0037
 2.69        .9964        .4964        .0036
 2.70        .9965        .4965        .0035
 2.71        .9966        .4966        .0034
 2.72        .9967        .4967        .0033
 2.73        .9968        .4968        .0032
 2.74        .9969        .4969        .0031
 2.75        .9970        .4970        .0030
 2.76        .9971        .4971        .0029
 2.77        .9972        .4972        .0028
 2.78        .9973        .4973        .0027
 2.79        .9974        .4974        .0026
 2.80        .9974        .4974        .0026
 2.81        .9975        .4975        .0025
 2.82        .9976        .4976        .0024
 2.83        .9977        .4977        .0023
 2.84        .9977        .4977        .0023
 2.85        .9978        .4978        .0022
 2.86        .9979        .4979        .0021
 2.87        .9979        .4979        .0021
 2.88        .9980        .4980        .0020
 2.89        .9981        .4981        .0019
 2.90        .9981        .4981        .0019
 2.91        .9982        .4982        .0018
 2.92        .9982        .4982        .0018
 2.93        .9983        .4983        .0017
 2.94        .9984        .4984        .0016
 2.95        .9984        .4984        .0016
 2.96        .9985        .4985        .0015
 2.97        .9985        .4985        .0015
 2.98        .9986        .4986        .0014
 2.99        .9986        .4986        .0014
 3.00        .9987        .4987        .0013
 3.01        .9987        .4987        .0013
 3.02        .9987        .4987        .0013
 3.03        .9988        .4988        .0012
 3.04        .9988        .4988        .0012
 3.05        .9989        .4989        .0011
 3.06        .9989        .4989        .0011
 3.07        .9989        .4989        .0011
 3.08        .9990        .4990        .0010
 3.09        .9990        .4990        .0010
 3.10        .9990        .4990        .0010
 3.11        .9991        .4991        .0009
 3.12        .9991        .4991        .0009
 3.13        .9991        .4991        .0009
 3.14        .9992        .4992        .0008
 3.15        .9992        .4992        .0008
 3.16        .9992        .4992        .0008
 3.17        .9992        .4992        .0008
 3.18        .9993        .4993        .0007
 3.19        .9993        .4993        .0007
 3.20        .9993        .4993        .0007
 3.21        .9993        .4993        .0007
 3.22        .9994        .4994        .0006
 3.23        .9994        .4994        .0006
 3.24        .9994        .4994        .0006
 3.25        .9994        .4994        .0006
 3.26        .9994        .4994        .0006
 3.27        .9995        .4995        .0005
 3.28        .9995        .4995        .0005
 3.29        .9995        .4995        .0005
 3.30        .9995        .4995        .0005
 3.31        .9995        .4995        .0005
 3.32        .9995        .4995        .0005
 3.33        .9996        .4996        .0004
 3.34        .9996        .4996        .0004
 3.35        .9996        .4996        .0004
 3.36        .9996        .4996        .0004
 3.37        .9996        .4996        .0004
 3.38        .9996        .4996        .0004
 3.39        .9997        .4997        .0003
 3.40        .9997        .4997        .0003
 3.41        .9997        .4997        .0003
 3.42        .9997        .4997        .0003
 3.43        .9997        .4997        .0003
 3.44        .9997        .4997        .0003
 3.45        .9997        .4997        .0003
 3.46        .9997        .4997        .0003
 3.47        .9997        .4997        .0003
 3.48        .9997        .4997        .0003
 3.49        .9998        .4998        .0002
 3.50        .9998        .4998        .0002

Tale tabella si utilizza nel seguente modo: si rileva ad esempio, che l'area di probabilità compresa tra le ordinate corrispondenti ai valori di ascissa -1 è 0,3413.

L'area di probabilità compresa tra le ordinate corrispondenti ai valori di ascissa -1 e +1 è, perciò, 0,6826.

Questo significa che in una distribuzione normale standardizzata uno scarto x ha probabilità 0,3413 di essere compreso nell'intervallo (0;1); ha probabilit&grave 0,3413 di essere compreso nell'intervallo (-1;0); ha probabilità 0,6826 di essere compreso nell'intervallo (-1;+1); ha probabilità 0,1587 di essere compreso nell'intervallo (-infinito;-1) e uguale probabilità di essere compreso nell'intervallo (+1;+infinito). Poichè tale tavola (detta di Sheppard) è calcolata per una distribuzione normale standardizzata, occorre, ricondurre le altre distribuzioni a questa con la trasformazione:

che ci permette di passare dai dati grezzi della vecchia distribuzione, ai valori della normale standardizzata, cioè espressi in scarti tipo.

Calcolo di aree di probabilità entro predeterminate ascisse

Supponiamo di avere una distribuzione normale qualsiasi.
Ad esempio si vuole valutare l'area di probabilità di una distribuzione normale con media uguale a 10 e scarto tipo uguale a 3 delimitata dalle ascisse X1 = 5 e X2 = 8.

Valori di XValori di ZAree di probabilità
X1 = 5 Z1= (5-10)/3=-1.670.4525
X2=8T2=(8-10)/3=-0.670.2486
Differenza0.2039

La variabile X ha, in questo caso, probabilità 0.2039 di cadere nell'intervallo (5;8), avrà probabilità 0.0475 di cadere nell'intervallo (-infinito;5) e 0.7486 di cadere nell'intervallo (8;+infinito).

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