Find upper and lower bound.
Show transcribed image text 9.4.9 Question Help * A simple random sample of size n 40 is drawn from a population. The sample mean is found to be x 121.9 and the sample standard deviation is found to be s= 13.2. Construct a 99% confidence interval for the population mean. The lower bound is (Round to two decimal places as needed.)
9.4.9 Question Help * A simple random sample of size n 40 is drawn from a population. The sample mean is found to be x 121.9 and the sample standard deviation is found to be s= 13.2. Construct a 99% confidence interval for the population mean. The lower bound is (Round to two decimal places as needed.)