SOLUTION: A large group of senior citizens enrolled for adult evening classes at a university. To get a quick check on whether there has been an increase from last year's average age of 65.4

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Question 509132: A large group of senior citizens enrolled for adult evening classes at a university. To get a quick check on whether there has been an increase from last year's average age of 65.4 years, the director of the program takes a random sample of 15 of the enrollees, getting 68, 62, 70, 64, 61, 58, 65, 86, 88, 62, 60, 71, 60, 84, and 61 years
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