A researcher would like to investigate whether stress levels change over time for a group of adults entering an exercise program. He compares scores from a life-stress measurement instrument given to each participant at baseline, 6 weeks, and 12 weeks. What test should he use?

Question 7 0 / 1 point A researcher would like to investigate whether stress levels change over time for a group of adults entering an exercise program. He compares scores from a life-stress measurement instrument given to each participant at baseline, 6 weeks, and 12 weeks. What test should he use? Opaired-samples t-test Mann-Whitney Rank-sum test OWilcoxon signed-rank test O Chi-square test A test designed for repeated measures, more than two timepoints Linear regression