Question

A t-test can compare as many as four groups at a time without losing power

a. true
b. false

Answer 1

False. A t-test can only compare two groups at a time, not more than two. One-way ANOVA should be used for comparing means between multiple groups.

Step-by-step explanation:

B. False.

A t-test can only compare two groups at a time, not more than two. If there are more than two groups, one-way ANOVA (analysis of variance) should be used instead of t-test. One-way ANOVA allows for a comparison of means between multiple groups and helps to avoid making multiple pairwise comparisons that increase the likelihood of making a Type 1 error.