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A researcher wants to estimate the average number of hours students spend in social media in a day. From the previous studies, the standard deviation is estimated at 45 minutes. What should be the sample size if the researcher wants to be 90% confident of being correct to within 5 minutes? 220 197 219 198

A researcher wants to estimate the average number of hours students spend in social media in a day. From the previous studies, the standard deviation is estimated at 45 minutes. What should be the sample size if the researcher wants to be 90% confident of being correct to within 5 minutes? 220 197 219 198

MATLAB: An Introduction with Applications
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 researcher wants to estimate the average number of hours students spend in social media in a day. From the previous studies, the standard deviation is estimated at 45 minutes. What should be the sample size if the researcher wants to be 90% confident of being correct to within 5 minutes? 220 197 219 198
Transcribed Image Text:A researcher wants to estimate the average number of hours students spend in social media in a day. From the previous studies, the standard deviation is estimated at 45 minutes. What should be the sample size if the researcher wants to be 90% confident of being correct to within 5 minutes? 220 197 219 198
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