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Solved: Computer-mediated communication study (cont’d).
Chapter 15, Problem 86SE(choose chapter or problem)
Computer-mediated communication study (cont’d). Refer to Exercise 15.85. Relational intimacy scores (measured on a 7-point scale) were obtained for each participant after each of three different meeting sessions. The researchers hypothesized that relational intimacy scores for participants in the CMC group would tend to be higher at the third meeting than at the first meeting; however, they hypothesized that there would be no differences in scores between the first and third meetings for the FTF group.
a. Explain why a nonparametric Wilcoxon signed rank test is appropriate for analyzing the data.
b. For the CMC group comparison, give the null and alternative hypotheses of interest.
c. Give the rejection region for conducting the test (at \(\alpha\) = .05), part b. Recall that there were 24 participants assigned to the CMC group.
d. For the FTF group comparison, give the null and alternative hypotheses of interest.
e. Give the rejection region for conducting the test (at \(\alpha\) = .05), part d. Recall that there were 24 participants assigned to the FTF group.
Questions & Answers
QUESTION:
Computer-mediated communication study (cont’d). Refer to Exercise 15.85. Relational intimacy scores (measured on a 7-point scale) were obtained for each participant after each of three different meeting sessions. The researchers hypothesized that relational intimacy scores for participants in the CMC group would tend to be higher at the third meeting than at the first meeting; however, they hypothesized that there would be no differences in scores between the first and third meetings for the FTF group.
a. Explain why a nonparametric Wilcoxon signed rank test is appropriate for analyzing the data.
b. For the CMC group comparison, give the null and alternative hypotheses of interest.
c. Give the rejection region for conducting the test (at \(\alpha\) = .05), part b. Recall that there were 24 participants assigned to the CMC group.
d. For the FTF group comparison, give the null and alternative hypotheses of interest.
e. Give the rejection region for conducting the test (at \(\alpha\) = .05), part d. Recall that there were 24 participants assigned to the FTF group.
ANSWER:Step 1 of 7
(a)
Find the nonparametric test.
One of the test assumptions for parametric test is “Normality” assumption, but the difference between the first meeting and third meeting sessions is not normally distributed. Therefore, the paired t-test will not be appropriate to the data. Thus, the Wilcoxon signed rank test should be more appropriate to these data.