PSYC FPX 4700 Assessment 4 Anova Chi Square Tests and Regression

A researcher has the same participants rank two types of advertisements for the same product. Differences in ranks for each advertisement were compared. ___

For this situation, the Wilcoxon Signed-Rank Test is again the appropriate nonparametric test. This test is suitable because it compares the ranks of two related samples. Since the same participants are ranking both advertisements, the Wilcoxon Signed-Rank Test can effectively assess whether there is a significant difference in the rankings of the two types of advertisements.

A professor measures student motivation before, during, and after a statistics course in a given semester. Student motivation was ranked at each time in the semester, and the differences in ranks were compared. ___

In this case, the Friedman Test is the appropriate nonparametric test. This test is used for comparing three or more related groups. Since the same participants are being measured at three different times (before, during, and after the course), the Friedman Test can determine if there are significant differences in student motivation across these time points.

mean for Group 1 is lower than that for Group 2. The alpha level of 0.05 is less than the p-value of 0.024.

When the p-value is less than the alpha level, it suggests that the likelihood of observing such a substantial difference between the groups by chance alone is less than 5%. In other words, there is strong evidence that the difference between the two groups is not merely due to random variation.

Therefore, based on these results, we can reject the null hypothesis and conclude that there is a significant difference between the means of the two independent groups being examined.