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A professor of statistics took an elementary algebra test at the beginning of the session students. Here are the results: 78 72 84 81 78
A professor of statistics took an elementary algebra test at the beginning of the session students. Here are the results: 78 72 84 81 78 76 83 89 81 71 72 78 79 83 81 72 84 68 86 82
Find the mean and standard deviation of this 20-result population.
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