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2. Consider a random sample of 36 mechanical engineers averaging 41.7 year of age, with a standard deviation of 6.9 years. Construct a 95% confidence

2. Consider a random sample of 36 mechanical engineers averaging 41.7 year of age, with a standard deviation of 6.9 years. Construct a 95% confidence interval to estimate the average age of a mechanical engineer. 7 dif= n-1

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