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Bachelor degree or higher : n=88, mean=5.2yrs, standard deviation=1.3yrs Construct a 90% confidence interval for the mean job tenure of workers who have a bachelor's

Bachelor degree or higher : n=88, mean=5.2yrs, standard deviation=1.3yrs

Construct a 90% confidence interval for the mean job tenure of workers who have a bachelor's degree or higher. Also Include how to find the standard deviation.

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