As part of a survey a marketing representative asks a random

As part of a survey, a marketing representative asks a random sample of 28 business owners how much they would be willing to pay for a website for their company. She finds that the sample standard deviation is $3496. Assume the sample is taken from a normally distributed population. Construct 99% confidence intervals for

(a) the population variance   sigma squared2

(b) the population standard deviation sigma .

Interpret the results.

(a) The confidence interval for the population variance is ( , ). (Round to the nearest integer as needed.)

Solution

where is the n value for the given data