Incorrect Your answer is incorrect . Your lower confidence limit is not correct. 4 . Your upper confidence limit is not correct A researcher collected sample data for 20 middle-aged women. The sample had a mean serum cholesterol level ( measured in milligrams per one hundred milliliters) of 189:4, with a standard deviation of 9.6, 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: 170 584 X Upper limit: 208 216 Recheck