Allan Barnett

05/16/2024 · Elementary School

A researcher collected sample data for 18 middle-aged women. The sample had a mean serum cholesterol level (measured in milligrams per one nundred milliliters) of 192.2 , with a standard deviation of 7.7 . Assuming that serum cholesterol levels for middle-aged women are normally distributed, find a \( 95 \% \) confidence interval for the mean serum cholesterol level of all women in this age group. Give the lower limit and upper limit of the \( 95 \% \) confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit: