The Computer Anxiety Rating Scale (CARS) measures a person\'s computer anxiety,

Question

The Computer Anxiety Rating Scale (CARS) measures a person's computer anxiety, on a scale from 20 (none) to 100 (highest). Researchers administered CARS to 124 students in order to determine whether there are differences in the amount of computer anxiety for students with different majors. They found the results below. Complete parts (a) through (c). Click the icon to view the results. Click on the icon to view a partial table of critical values associated with alpha = 0.05 of the Studentized Range, Q. a. Complete the ANOVA summary table. b. At the 0.05 level of significance, is there evidence of a difference in the mean computer anxiety experienced by different majors? Determine the A. H_0: mu_1 = mu_2 = ... = mu_31 H_1: mu_1 notequalto mu_2 notequalto ... notequalto mu_31 B. H_0: mu_1 = mu_2 = ... = mu_4 H_1: Not all mu_j are equal (where j = 1, 2, .., 4) C. H_0: mu_1 = mu_2 = .... = mu+31 H_1: Not all mu_j are equal (where j = 1, 2, ...31) D. H_0: mu_1 = mu_2 = ... = mu_4 H_1: mu_1 notequalto mu_2 notequalto ... notequalto mu_4 Use technology to determine the p-value.

Explanation / Answer

a) Mean square among majors = 2856 / 3 = 952

Mean square within majors = 16320 / 120 = 136

F = 952 / 136 = 7

ANOVA summary table:

b) Option B is correct.

c) p - value = 0.000 (Rounded off to 3 decimal places)

Source Df SS MS F Among Majors 3 2856 952 7 Within Majors 120 16320 136 Total 123 19176

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