Question 2 of 5 (1 point) Attempt 23 of Unlimited 7.3 Section Exercise 5 Overtime Hours Worked A random sample of 12 registered nurses in a large hospital showed that they worked on average 43.8 hours per week. The standard deviation of the sample was 2.5. Estimate the mean of the population with 99% confidence. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.