A researcher wants to study the impact of pizza consumption on the happiness of college freshmen,sophomores,and juniors.What test statistic would the researcher need to use to evaluate the difference in effectiveness between the groups?

A) dependent-samples t-test
B) analysis of variance
C) independent-samples t-test
D) repeated-measures analysis of variance

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Breanna Miller · Accepted Answer

Final Answer : B, Explanation :  An analysis of variance (ANOVA) would be the best test statistic to evaluate the difference in effectiveness between the groups, as it allows for the comparison of means between three or more groups. It would also allow the researcher to test for any interaction effects between pizza consumption and happiness across the different class levels. The dependent-samples t-test and repeated-measures ANOVA are not appropriate for this study as they are used for within-subjects designs, where each participant is tested in multiple conditions. The independent-samples t-test is not appropriate either, as it is used for comparing means between two independent groups.

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