A clinic offers a weight-loss program. The table below gives the amounts of weight loss, in pounds, for a random sample of 20 of its clients at the conclusion of the program. Assume that the data are...

Extracted text: A clinic offers a weight-loss program. The table below gives the amounts of weight loss, in pounds, for a random sample of 20 of its clients at the conclusion of the program. Assume that the data are normally distributed. Complete parts (a) and (b). 21 17 15 12 20 16 13 11 6. 22 13 6. 10 11 19 18 8 19 10 29 ..... a. Find a 999% confidence interval for the population mean. The 99% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)