A researcher performs a single-factor repeated-measures ANOVA and finds a significant difference among the study's three treatment conditions. The researcher should:
A) Perform a Tukey HSD post hoc test
B) Assume that the group differences were due to chance alone
C) Establish at least a 95% confidence interval
D) All of the above

Question

Quizplus · Accepted Answer

A Tukey HSD test is a common post hoc test used to determine which specific groups differ significantly from each other after a significant ANOVA result. Assuming that the group differences were due to chance alone (B) would be incorrect and not supported by the significant ANOVA result. While establishing a confidence interval (C) is a good practice in general for statistical analysis, it is not directly related to determining post hoc group differences. Therefore, the best choice is A, to perform a Tukey HSD post hoc test.

A Researcher Performs a Single-Factor Repeated-Measures ANOVA and Finds a Significant