CUSUM chart with subgroup variable
I'm trying to understand how the cusum chart is calculated usind a subgroup variable X where some X values are present multiple times. For example, I have 3-5 measurements per day and the cusum chart should be grouped by day. Since it says in the JMP help regarding X "If a value of this column is present more than once, the average response at each X value is plotted on the CUSUM chart.", I though...