Question: A random sample of 15 registered nurses in a large hospital showed that they worked on average 44.2 hours per week. The standard deviation of

A random sample of 15 registered nurses in a large hospital showed that they worked on average 44.2 hours per week. The standard deviation of the sample was 2.6. Estimate the mean of the population with 90% confidence.

Assume that all variables are approximately normally distributed.

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