Tukey's HSD with unequal n distribution used to calculate p-values
I am trying to understand the formulae used by SPSS to calculate the SE and
p-values for the Tukey's HSD test.
The Tukey-Cramer SE formula is SE_Q= SQRT(MSE/2*(1/ni+1/nj))... However, in
the Tukey's multiple comparison output SPSS uses SE = SQRT(MSE*(1/ni+1/nj))
- it drops the two -. I thought that in this later case the p-value would be
obtained from the t-distribution with N-k degrees of freedom. It is not...
It is not also the Tukey's q distribution ... so I am lost here (specially
because for the Confidence interval the SE_Q and the q distribution are
Can any of the members of the list help me sort this out?
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
For a list of commands to manage subscriptions, send the command