Journal of Computer-Mediated Communication (Apr.2004) study comparing people who interact via computer mediated communication (CMC) with those who meet face- to-face (FTF), presented in Exercise. Relational intimacy scores (measured on a seven-point scale) were obtained for each participant after each of three different meetings. The researchers hypothesized that relational intimacy scores for participants in the CMC group will tend to be higher at the third meeting than at the first meeting; however, they hypothesize that there are no differences in scores between the first and third meetings for the FTF group.
a. Explain why a nonparametric Wilcoxon signed ranks test is appropriate for analyzing the data.
b. For the CMC group comparison, give the null and alter native hypotheses of interest.
c. Give the rejection region (at a = .05) for conducting the test mentioned in part b. Recall that there were 24 participants assigned to the CMC group.
d. For the FTF group comparison, give the null and alter native hypotheses of interest.
e. Give the rejection region (at a = .05) for conducting the test mentioned in part d. Recall that there were 24 participants assigned to the FTF group.