The sleeping time at night of the people is normally distributed. Based on a random sample of 10 people, the 95% confidence interval for the true mean of sleeping time was obtained as 6.5< µ <7.7 hours. a) Find the estimated mean sleeping time and the standard deviation (s). b) Find the margin of error E. c) Construct a 90% confidence interval based on the same data. d) How large should the sample be if you want to be 99% confident that the estimate is accurate within 0.10 hours of true mean of sleeping time. (Assume o=0.98.
The sleeping time at night of the people is normally distributed. Based on a random sample of 10 people, the 95% confidence interval for the true mean of sleeping time was obtained as 6.5< µ <7.7 hours. a) Find the estimated mean sleeping time and the standard deviation (s). b) Find the margin of error E. c) Construct a 90% confidence interval based on the same data. d) How large should the sample be if you want to be 99% confident that the estimate is accurate within 0.10 hours of true mean of sleeping time. (Assume o=0.98.
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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