A clinic offers a weight reduction program. A review of its records found the following weight losses, in pounds, for a random sample of ten of its patients at the conclusion of the program. 18.2 25.9 6.3 11.8 15.4 20.3 16.8 19.5 12.3 17.2 Assume the population distribution is normal. Use Excel to compute necessary statistics and probabilities.
(a) Find a 99% confidence interval for the population mean weight-loss.