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) (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? O A. Doubling the required accuracy nearly quarters the sample size. O B. Doubling the required accuracy nearly doubles the sample size. OC. Doubling the required accuracy nearly quadruples the sample size. OD. Doubling the required accuracy nearly halves the sample size. (d) How many subjects are needed to estimate the mean number of books read the previous year within six books with 99% confidence? This 99% confidence level requires subjects. (Round up to the nearest subject.) Compare this result to part (a) How does increasing the level of confidence in the estimate affect sample size? Why is this reasonable?
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) (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? O A. Doubling the required accuracy nearly quarters the sample size. O B. Doubling the required accuracy nearly doubles the sample size. OC. Doubling the required accuracy nearly quadruples the sample size. OD. Doubling the required accuracy nearly halves the sample size. (d) How many subjects are needed to estimate the mean number of books read the previous year within six books with 99% confidence? This 99% confidence level requires subjects. (Round up to the nearest subject.) Compare this result to part (a) How does increasing the level of confidence in the estimate affect sample size? Why is this reasonable?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
People were polled on how many books they read the previous year. Initial survey results indicate that
s = 13.4 books. Complete parts (a) through (d) below.
Transcribed Image Text:People were polled on how many books they read the previous year. Initial survey results indicate that s = 13.4 books. Complete parts (a) through (d) below.
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)
(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?
O A. Doubling the required accuracy nearly quarters the sample size.
O B. Doubling the required accuracy nearly doubles the sample size.
OC. Doubling the required accuracy nearly quadruples the sample size.
O D. Doubling the required accuracy nearly halves the sample size.
(d) How many subjects are needed to estimate the mean number of books read the previous year within six books with 99% confidence?
This 99% confidence level requires subjects. (Round up to the nearest subject.)
Compare this result to part (a). How does increasing the level of confidence in the estimate affect sample size? Why is this reasonable?
O
in
33
H
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Transcribed Image Text:Dolled on how many books they read the previous year. Initial survey results indicate that s = 13.4 books. Complet
icon to view a partial table of critical values.
S
fic
S
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n
n
Partial Critical Value Table
Level of Confidence,
(1-x) 100%
i
90%
95%
99%
Area in Each Tail,
33
Print
0.05
0.025
0.005
α
2
Done
8
Critical Value, Zα/2
1.645
1.96
2.575
-
90% con
idence level requires
subjects. (Round up to the nearest subject.)
result to part (a). How does increasing the level of confidence in the estimate affect sample size? Why is this reasona
th 90% c
99% confic
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