Why is one-way ANOVA better than repeated independent-sample t tests for comparing means for three or more groups?
A) one-way ANOVA allows for a nominal dependent variable
B) one-way ANOVA is more likely to find a significant difference
C) repeated independent-samples t tests increase the chance of a Type I error
D) repeated independent-samples t tests increase the chance of multicollinearity

Question

Quizplus · Accepted Answer

One-way ANOVA is preferred over multiple independent-sample t tests for comparing three or more groups because conducting multiple t tests increases the overall chance of committing a Type I error, which is falsely rejecting the null hypothesis. ANOVA controls for this error rate across the comparisons.

Why Is One-Way ANOVA Better Than Repeated Independent-Sample T Tests