Using the Bonferroni post hoc test, to make all possible comparisons between the means of three groups while keeping the overall p level at 0.05, what should the p level be for each comparison?
A) 0.050
B) 0.001
C) 0.017
D) 0.008

Question

Quizplus · Accepted Answer

The Bonferroni post hoc test is a method of adjusting the p-value to maintain an overall alpha level of 0.05 while doing multiple comparisons. To find the p-value for each comparison, we divide the overall alpha level (0.05) by the number of comparisons being made (which is the number of pairs of groups, or (n*(n-1))/2, where n is the number of groups). For three groups, this gives us three pairwise comparisons, so the p-level for each comparison would be 0.05/3 = 0.017. Therefore, the C option is the correct answer.

Using the Bonferroni Post Hoc Test, to Make All Possible