Question

The number of hours of reserve capacity of 10 randomly selected automotive batteries is shown to the right. 1.72 1.86 1.59 1.69 1.71 1.94 1.37 1.57 1.43 2.03 Assume the sample is taken from a normally distributed population. Construct 98​% confidence intervals for​ (a) the population variance sigmasquared and​ (b) the population standard deviation sigma. ​(a) The confidence interval for the population variance is ​( nothing​, nothing​). ​(Round to three decimal places as​ needed.) Interpret the results. Select the correct choice below and fill in the answer​ box(es) to complete your choice. ​(Round to three decimal places as​ needed.) A. With 2​% ​confidence, it can be said that the population variance is greater than nothing. B. With 2​% ​confidence, it can be said that the population variance is between nothing and nothing. C. With 98​% ​confidence, it can be said that the population variance is between nothing and nothing. D. With 98​% ​confidence, it can be said that the population variance is less than nothing. ​(b) The confidence interval for the population standard deviation is ​( nothing​, nothing​). ​(Round to three decimal places as​ needed.) Interpret the results. Select the correct choice below and fill in the answer​ box(es) to complete your choice. ​(Round to three decimal places as​ needed.) A. With 98​% ​confidence, you can say that the population standard deviation is less than nothing hours of reserve capacity. B. With 2​% ​confidence, you can say that the population standard deviation is between nothing and nothing hours of reserve capacity. C. With 2​% ​confidence, you can say that the population standard deviation is greater than nothing hours of reserve capacity. D. With 98​% ​confidence, you can say that the population standard deviation is between nothing and nothing hours of reserve capacity. Click to select your answer(s).

Answer 1