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Reference Tables from MiC Quality


d2 Tables

Values of and

 
Size of samples (n)
# Samples (k)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
1.414
1.912
2.239
2.481
2.673
2.830
2.963
3.078
3.179
3.269
3.350
3.424
3.491
3.553
2
1.279
1.805
2.151
2.405
2.604
2.768
2.906
3.025
3.129
3.221
3.305
3.380
3.449
3.513
3
1.231
1.769
2.120
2.379
2.581
2.747
2.886
3.006
3.112
3.205
3.289
3.366
3.435
3.499
4
1.206
1.750
2.105
2.366
2.570
2.736
2.877
2.997
3.103
3.197
3.282
3.358
3.428
3.492
5
1.191
1.739
2.096
2.358
2.563
2.730
2.871
2.992
3.098
3.192
3.277
3.354
3.424
3.488
6
1.181
1.731
2.090
2.353
2.558
2.726
2.867
2.988
3.095
3.189
3.274
3.351
3.421
3.486
7
1.173
1.726
2.085
2.349
2.555
2.723
2.864
2.986
3.092
3.187
3.272
3.349
3.419
3.484
8
1.168
1.721
2.082
2.346
2.552
2.720
2.862
2.984
3.090
3.185
3.270
3.347
3.417
3.482
9
1.164
1.718
2.080
2.344
2.550
2.719
2.860
2.982
3.089
3.184
3.269
3.346
3.416
3.481
10
1.160
1.716
2.077
2.342
2.549
2.717
2.859
2.981
3.088
3.183
3.268
3.345
3.415
3.480
11
1.157
1.714
2.076
2.340
2.547
2.716
2.858
2.980
3.087
3.182
3.267
3.344
3.415
3.479
12
1.155
1.712
2.074
2.3439
2.546
2.715
2.857
2.979
3.086
3.181
3.266
3.343
3.414
3.479
13
1.153
1.710
2.073
2.338
2.545
2.714
2.856
2.978
3.085
3.180
3.266
3.343
3.413
3.478
14
1.151
1.709
2.072
2.337
2.545
2.714
2.856
2.978
3.085
3.180
3.265
3.342
3.413
3.478
15
1.150
1.708
2.071
2.337
2.544
2.713
2.855
2.977
3.084
3.179
3.265
3.342
3.412
3.477
 
1.128
1.693
2.059
2.326
2.534
2.704
2.847
2.970
3.078
3.173
3.259
3.336
3.407
3.472
Duncan A. J (1986), Quality Control and Industrial Statistics Appendix D3
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