To test the effectiveness of the use of technology in a statistics course, four different sections were taught with different combinations of calculators and computer software, with final course averages listed below for randomly selected students from each section. Test the claim that the samples come from populations that are not all the same.

Use a 0.05 significance level with the indicated test. If no particular test is specified, use the appropriate nonparametric test from this chapter.

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Calculators Only 74 85 91 62 82 87 60 7 78 89 82 64 66 78 83 55 73 87 66 80 77 63 84 70 77 91 73 85 72 57 81 65 Computers Only Calculators and Computers No Calculators and No Computers