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QUESTION 25 Suppose we expand the study described in Question #24. Instead of looking only at...

QUESTION 25

Suppose we expand the study described in Question #24. Instead of looking only at juniors and seniors, we also take random samples of freshmen and sophomores. Which inferential statistical test would we use to determine whether there is a statistically significant effect of year-in-college on exam scores?

independent-samples t test/two-sample t test

dependent-samples t test / matched-pairs t test / related-samples t test / paired t test

chi-square

one-way ANOVA

factorial ANOVA
Math   Statistics-And-Probability   
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Answer #1

Now here there are more than 2 groups to be compared. To be precise 4 groups are there. we have to compare the mean exam scores of these 4 different year-in-college students.

Now here we want to compare the means for juniors, seniors, freshmen, and sophomores.

First, we look at the definition of one-way ANOVA:

One-Way ANOVA compares the means of two or more independent groups in order to determine whether there is statistical evidence that the associated population means are significantly different.

Thus in this scenario, we should be using One-Way ANOVA.

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