People were polled on how many books they read the previous year. Initial survey results indicate that s= 19.9 books. Complete parts (a) through (d) below. A Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) Partial Critical Value Table (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) (c) What effect does doubling the required accuracy have on the sample size? Level of Confidence, (1-a)• 100% Critical Value, Zu/2 Area in Each Tail, O A. Doubling the required accuracy nearly quadruples the sample size. O B. Doubling the required accuracy nearly doubles the sample size. OC. Doubling the required accuracy nearly halves the sample size. O D. Doubling the required accuracy nearly quarters the sample size. 0.05 0.025 1.645 90% 95% 1.96 99% 0.005 2.575 Print Done (d) How many subjects are needed to estimate the mean number of books read the previous year within six books with 99% confidence?
People were polled on how many books they read the previous year. Initial survey results indicate that s= 19.9 books. Complete parts (a) through (d) below. A Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) Partial Critical Value Table (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) (c) What effect does doubling the required accuracy have on the sample size? Level of Confidence, (1-a)• 100% Critical Value, Zu/2 Area in Each Tail, O A. Doubling the required accuracy nearly quadruples the sample size. O B. Doubling the required accuracy nearly doubles the sample size. OC. Doubling the required accuracy nearly halves the sample size. O D. Doubling the required accuracy nearly quarters the sample size. 0.05 0.025 1.645 90% 95% 1.96 99% 0.005 2.575 Print Done (d) How many subjects are needed to estimate the mean number of books read the previous year within six books with 99% confidence?
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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