Chapter 12: Constants for Selected Control Charts.

Col 1: Sub group size (n)
Col 2: A(3)
Col 3: A(2)
Col 4: B(3)
Col 5: B(4)
Col 6: D(3)
Col 7: D(4)
Col 8: d(2)

   2   2.659  1.880    0    3.267    0    3.267    1.128
   3   1.954  1.023    0    2.568    0    2.575    1.693
   4   1.628  0.729    0    2.266    0    2.282    2.059
   5   1.427  0.577    0    2.089    0    2.115    2.326
   6   1.287  0.483  0.030  1.970    0    2.004    2.534
   7   1.182  0.419  0.118  1.882  0.076  1.924    2.704
   8   1.099  0.373  0.185  1.815  0.136  1.864    2.847
   9   1.032  0.337  0.239  1.761  0.184  1.816    2.970
  10   0.975  0.308  0.284  1.716  0.223  1.777    3.078
  11   0.927  0.285  0.321  1.679  0.256  1.744    3.173
  12   0.886  0.266  0.354  1.646  0.283  1.717    3.258
  13   0.850  0.249  0.382  1.618  0.307  1.693    3.336
  14   0.817  0.235  0.406  1.594  0.328  1.672    3.407
  15   0.789  0.223  0.428  1.572  0.347  1.653    3.472
  16   0.763  0.212  0.448  1.552  0.363  1.637    3.532
  17   0.739  0.203  0.466  1.534  0.378  1.622    3.588
  18   0.718  0.194  0.482  1.518  0.391  1.608    3.640
  19   0.698  0.187  0.497  1.503  0.403  1.597    3.689
  20   0.680  0.180  0.510  1.490  0.414  1.586    3.735