the following are heights in inches of randomly selected wom

the following are heights (in inches) of randomly selected women:

63.7, 61.2, 66.0, 62.5, 65.7, 64.4, 63.0, 61.9

a). find the best point estmate of the population variance

b). construct a 99% confidence interval estimate of the population standard deviation

c). does the confidence interval contain the standard deviation value of 2.5 inches? (women\'s heights are unknown to have a standard deviation of 2.5 inches)