James Desreumaux,VP of Human Resources of American First Banks (AFB),is reviewing the employee training programs of AFB banks. His staff randomly selected personnel files for 10 tellers in the Southwest Region,and determined that their mean training time was 25 hours and that the standard deviation was 5 hours. Assume that training times are normally distributed. The 95% confidence interval for the population variance of training times is ________.
A) 11.83 to 83.33
B) 2.37 to 16.67
C) 2.66 to 13.51
D) 13.30 to 67.57
E) 15.40 to 68.28

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The Answer of James Desreumaux,VP of Human Resources of American First Banks (AFB),is reviewing the employee training programs of AFB banks. His staff randomly selected personnel files for 10 tellers in the Southwest Region,and determined that their mean training time was 25 hours and that the standard deviation was 5 hours. Assume that training times are normally distributed. The 95% confidence interval for the population variance of training times is ________.
A) 11.83 to 83.33
B) 2.37 to 16.67
C) 2.66 to 13.51
D) 13.30 to 67.57
E) 15.40 to 68.28