Suppose the Fat Content of a Hotdog Follows Normal Distribution

Multiple Choice

Suppose the fat content of a hotdog follows normal distribution.Ten random measurements give a mean of 21.77 and standard deviation of 3.69.The 90% confidence interval for the population variance of fat content of a hotdog is ________

A) 5.2 to 21.3
B) 7.2 to 36.9
C) 19.63 to 23.91
D) 19.85 to 23.69
E) 2.69 to 5.1