Question

After observing statistically significant ANOVA results, Bonferroni-corrected inferences to determine which groups differ from each other require the following steps (select all that apply): o Select one or more: a. Compute the type I error rate allowable for each pairwise comparison in order to insure that the type I error rate across all comparisons does not exceed some pre-specified level b. Determine that the difference between a specific pair of groups is statistically significant if the t-test p-value is less than the Bonferroni-corrected type l error rate o o c. Use the mean square error from the ANOVA when calculating the standard error to be used in the pairwise two-sample t-tests d. Use the degrees of freedom associated with the mean square error from the ANOVA when calculating the p-values for each of the pairwise two-sample t-test O

Answer 1

all of the four options are correct

(since experiment wise type I error =1-(1- type I error of pairwise experiment)ⁿ where n=number of pairs,

std error is based on MSE and degree of freedom is equal to df of error)