The test scores for selected samples of sociology students who took the course f

ID: 3431628 • Letter: T

Question

The test scores for selected samples of sociology students who took the course from three different instructors are shown below.

Instructor A Instructor B Instructor C

83 90 85

60 55 90

80 84 90

85 91 95

71 85 80

At a = 0.05, test to see if there is a significant difference among the averages of the three groups.

Null hypothesis: there is no significant difference among the averages of the three groups.

Alternative hypothesis: there is a significant difference among the averages of the three groups.

The test statistic is

F=1.56

The p-value= 0.2493 (from F table)

Since the p-value is larger than 0.05, we do not reject Ho.

So we can not conclude that there is a significant difference among the averages of the three groups.

Mean n Std. Dev 75.8 5 10.33 A 81.0 5 14.85 B 88.0 5 5.70 C 81.6 15 11.38 Total

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