Suppose that a company claims that its batteries last 250 hours on average. It took many large samples, and each time the mean number of hours was outside the 95% confidence interval. Based on this information alone, which of the following is probably not the mean number of hours that the company's batteries last?

A. 235
B. 240
C. 245
D. 250
(Since its outside the confidence interval I think it would be 250 but i just wanted to check, thanks!)

Question

Suppose that a company claims that its batteries last 250 hours on average. It took many large samples, and each time the mean number of hours was outside the 95% confidence interval. Based on this information alone, which of the following is probably not the mean number of hours that the company's batteries last? 

A. 235
B. 240
C. 245
D. 250
(Since its outside the confidence interval I think it would be 250 but i just wanted to check, thanks!)

perl · Answer

yes i think thats right , 250 is probably not the mean

perl · Answer

because 250 will be at the center of the 95% confidence interval that is claimed

hockeychick23 · Answer

ok thanks!