A random sample of male nontraditional students at a Midwestern University yields the following ages (in years): 52, 68, 22, 35, 30, 56, 39, 48. For this data, the sample mean is 43.75 ands = 15.05. The critical value to compute a 90% confidence interval is O 1.645 O 1.86 O 1.895 1.415

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