# A firm employs 189 junior accountants. In a random sample of 50 of these, the mean number

## Question:

a. Find a 95% confidence interval for the mean number of hours overtime billed per junior accountant in this firm that week.

b. Find a 99% confidence interval for the total number of hours overtime billed by junior accountants in the firm during the week of interest.

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**Related Book For**

## Statistics For Business And Economics

**ISBN:** 9780132745659

8th Edition

**Authors:** Paul Newbold, William Carlson, Betty Thorne