Use the following information to answer question. Ron Moy has taught corporate finance for years, but this is the first year he has included the use of the computer to his course. Actually, one class did not use the computer. A second class had to use the computer. The third class was introduced to the computer but had the option not to use it. The test results that follow are grades on standardized tests and are believed not to follow a normal distribution.

Perhaps not surprisingly, a colleague from the computer science department strongly argues for using the computer. Can you prove for him that class 2 is better than class 1? Do a 5 percent test.

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Class 1 76 72 69 71 33 67 62 60 59 58 Class 2 KFZ7858 63 81 65 77 80 65 69 Class 3 79 73 68 88 62 86 66 70 78 65