subgroup size

  1. W

    Missing data-can a heterogenous small subgroup affect the outcome of analysis?

    Hello everyone, I'm confronting an obstacle when doing clinical research, the problem is described as follows: There are 141 pieces of patients' data, and I want to use 2 formulas to analyze them. Formula A only needs 2 variables (Va, Vb), Formula B need 5 variables (Va, Vb, Vc, Vd, Ve). As you...
  2. C

    Contro Chart Sub-group size

    My first post. Is there a formula for subgroup size for average control charts for variables.