Question: A Wilcoxon signed-rank test comparing pre and post test scores for 20 subjects yields a p-value of 0.003. The median score on the 1st test
A Wilcoxon signed-rank test comparing pre and post test scores for 20 subjects yields a p-value of 0.003. The median score on the 1st test was 10. The median score on the 2nd test was 15. Which of the following is an appropriate manner of reporting these results? Assume an alpha level of 0.05. Question 3 options: The subjects scored higher on the post-test (median = 15) as compared to the pre-test (median = 10), however this difference was not statistically significant (p = 0.003). Group A scored significantly lower than group B on the pre and post tests (Medians: 10 and 15, respectively). This difference was statistically significant (p = 0.003). The subjects scored higher on the post-test (median = 15) as compared to the pre-test (median = 10). This difference was statistically significant (p = 0.003). None of these are correct. Means should be reported as opposed to medians when conducting a Wilcoxon signed-rank test
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