A clinic offers a weight-loss program. A review of its records found the following amounts of weight loss, in pounds, for a random sample of 10 clients at the conclusion of the program:

18.2 25.9 6.3 11.8 15.4 20.3 16.8 18.5 12.3 17.2 Find a 90% confidence interval for the population variance of weight loss for clients of this weight-loss program.