Concerning a Tukey multiple comparison procedure Concerning

Concerning a Tukey multiple comparison procedure...

Concerning a Tukey multiple comparison procedure, what is the proper critical value for a 99% family confidence coefficient if the procedure is evaluating a variable with five levels that has five samples for each level (i.e.. 25 total samples)?

Solution

The degree of freedom is N-k = 25-5 = 20 where k is the number of treatments, k=5.

Therefore, from the tables, the required critical value is 4.232