Two tutoring services offer crash courses in preparation for the CPA exam. To check on the effectiveness of these services, 15 students were chosen. Five students were randomly assigned to service A, 5 were assigned to service B, and the remaining 5 did not take a crash course. Their scores on the examination, expressed as percentages, are given in the table.Service A Course Service B Course No Course 79 74 72 74 69 71 92 87 81 67 81 61 85 64 63a. Prepare the analysis of variance table.b. Test the null hypothesis that the three population mean scores are the same.c. Compute the minimum significant difference and indicate which subgroups have different means.
Two tutoring services offer crash courses in preparation for the CPA exam. To check on the effectiveness of these services, 15 students were chosen. Five students were randomly assigned to service A, 5 were assigned to service B, and the remaining 5 did not take a crash course. Their scores on the examination, expressed as percentages, are given in the table.
Service A Course Service B Course No Course
79 74 72
74 69 71
92 87 81
67 81 61
85 64 63
a. Prepare the analysis of variance table.
b. Test the null hypothesis that the three population
c. Compute the minimum significant difference and indicate which subgroups have different means.
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