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Statistics for Business and Economics | 12th Edition | ISBN: 9780321826237 | Authors: James T. McClave, P. George Benson, Terry T Sincich
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Computer-mediated communication study (cont’d). Refer to

Chapter 8, Problem 117SE

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QUESTION:

Computer-mediated communication study (cont’d). Refer to Exercise 8.116. The researchers also hypothesized that the mean relational intimacy score for participants in the group would significantly increase between the first and third meetings, but the difference between the first and third meetings would not significantly change for participants in the FTF group.

a. For the CMC group comparison, give the null and alternative hypotheses of interest.

b. The researchers made the comparison, part a, using a paired t-test. Explain why the data should be analyzed as matched pairs.

c. For the CMC group comparison, the reported test statistic was t = 3.04 with p-value = .003. Interpret these results. Is the researchers’ hypothesis supported?

d. For the FTF group comparison, give the null and alternative hypotheses of interest.

e. For the FTF group comparison, the reported test statistic was t = .39 with p-value = .70. Interpret these results. Is the researchers’ hypothesis supported?

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QUESTION:

Computer-mediated communication study (cont’d). Refer to Exercise 8.116. The researchers also hypothesized that the mean relational intimacy score for participants in the group would significantly increase between the first and third meetings, but the difference between the first and third meetings would not significantly change for participants in the FTF group.

a. For the CMC group comparison, give the null and alternative hypotheses of interest.

b. The researchers made the comparison, part a, using a paired t-test. Explain why the data should be analyzed as matched pairs.

c. For the CMC group comparison, the reported test statistic was t = 3.04 with p-value = .003. Interpret these results. Is the researchers’ hypothesis supported?

d. For the FTF group comparison, give the null and alternative hypotheses of interest.

e. For the FTF group comparison, the reported test statistic was t = .39 with p-value = .70. Interpret these results. Is the researchers’ hypothesis supported?

ANSWER:

Step 1 of 7

(a)

State the null and alternative hypothesis for CMC group.

Let the two population of interest be  and .

That is,  is the first meeting on the mean relational intimacy score for participants in the CMC group and  is the third meeting on the mean relational intimacy score for participants in the CMC group.

The difference in the relational intimacy score for participants in the first CMC group and third CMC group is denoted as .

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