A firm employs 189 junior accountants. In a random sample of 50 of these, the mean number of hours overtime billed in a particular week was 9.7, and the sample standard deviation was 6.2 hours.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.
A firm employs 189 junior accountants. In a random sample of 50 of these, the mean number of hours overtime billed in a particular week was 9.7, and the sample standard deviation was 6.2 hours.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.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A firm employs 189 junior accountants. In a random sample of 50 of these, the
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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