4h #13

A researcher collected sample data for 11 middle-aged women. The sample had a mean serum cholesterol level (measured in milligrams per one hundred milliliters) of 1886, with a standard deviation of 5.6. Assuming that serum cholesterol levels for middle-aged women are normally distributed, Find a 90% confidence interval for the mean serum cholesterol level of all women in this age group. Give the lower limit and upper limit of the 90% confidence interval. \f\f\f\f