The number of hours of reserve capacity of 10 randomly selected automotive batte

Question

The number of hours of reserve capacity of 10 randomly selected automotive batteries is shown to the right. Assume the sample is taken from a normally distributed population. Construct 95% confidence intervals for (a) the population variance sigma^2 and (b) the population standard deviation sigma. (a) The confidence interval for the population variance is (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 three decimal places as needed.) A. With 5% confidence, it can be said that the population variance is greater than B. With 95% confidence, it can be said that the population variance is less than C. With 5% confidence, it can be said that the population variance is between and D. With 95% confidence, it can be said that the population variance is between and (b) The confidence interval for the population standard deviation is (Round to three decimal places as needed.)

Explanation / Answer

here sample standard deviation is : 0.2119355248
q1. 0.0212 , 0.1496

question 2

right option c : 0.0212,01496

question 3:

0.1456, 0, 38687

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