Question

QUESTION 27

Suppose we want to know whether students feel more stressed at the beginning of the semester or at the end of the semester. We take a random sample of students. Midway through the first week of classes, we ask the students to rate their current stress level on a scale from 0 (completely relaxed) to 100 (completely stressed out). Midway through the last week of classes, we ask the same students to rate their current stress level using the same 0 to 100 scale. Which inferential statistical test would we use to determine whether there is a statistically significant difference between stress levels at the two time points?

		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

Answer 1

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

Explanation:

The dependent-samples t test / matched-pairs t test / related-samples t test / paired t test, we use to determine whether there is a statistically significant difference between stress levels at the two time points because the observation are taken from same student Midway through the first week of classes and Midway through the last week of classes (i.e. before and after)