Answered: A survey of 23 college freshmen found…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A survey of 23 college freshman found that they average 7.62 hours of sleep each night. A 90% confidence interval had a margin of error of 0.509. A. What are the lower and upper limits of the confidence interval? B. What are the standard deviation, assuming that the population standard deviation is known?

A survey of 23 college freshmen found that they average 7.62 hours of sleep each night. A 90% confidenc
a. What are the lower and upper limits of the confidence interval?
b. What was the standard deviation, assuming that the population standard deviation is known?
a. The lower limit of the confidence interval is and the upper limit of the confidence interval is
(Round to three decimal places as needed.)
b. The standard deviation, assuming that the population standard deviation is known, is
(Round to three decimal places as needed.)
Enter your answer in each of the answer boxes.

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