T
tetnal
Ladies and Gents, I've been having a few problems at work regarding the Var GRR as performed in Minitab v14.
The problem relates to the way in which the ANOVA table calculated. In Minitab the F statistic is calculated based on the variance of the repeat measurement, not as in the general heirarchical (nested) or crossed ANOVA.
Can anyone proved a process or statistical reason for this difference. I need an argument to convince a Chief Engineer and Statisical professional of the methods validity.
Mike Phillips
The problem relates to the way in which the ANOVA table calculated. In Minitab the F statistic is calculated based on the variance of the repeat measurement, not as in the general heirarchical (nested) or crossed ANOVA.
Can anyone proved a process or statistical reason for this difference. I need an argument to convince a Chief Engineer and Statisical professional of the methods validity.
Mike Phillips