Assume that the heights of female executives are normally distributed. A random sample of 20 female executives have a mean height of 62.5 inches and a standard deviation of 1.1 inches. Construct a 98% confidence interval for the population variance, σ2.
◦ (0.6, 2.7)
◦ (0.7, 3.2)
◦ (0.8, 1.7)
◦ (0.6, 3.0)