15.52) Find the necessary sample size. 2) A population is normal with a variance of 99. Suppose vou wish to estimate the population mean p. 2) Hnd the sample size needed to assure with 68.26 percent confidence that the sample mean will not differ from the population mean by more than 4 units. A) 9 B) 7 C) 613 D) 25 Ose the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
15.52) Find the necessary sample size. 2) A population is normal with a variance of 99. Suppose vou wish to estimate the population mean p. 2) Hnd the sample size needed to assure with 68.26 percent confidence that the sample mean will not differ from the population mean by more than 4 units. A) 9 B) 7 C) 613 D) 25 Ose the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
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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Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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Transcribed Image Text:MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answ ers the question.
Use the given degree of confidence and sample data to construct a confidence interval for the population mean u. A ssume
NAME
that the population has a normal distribution.
1) n = 10, x = 13.8, s = 2.4, 95 percent
1)
A) (12.11, 15.49)
B) (12.08, 15.52)
C) (12.09, 15.51)
D) (12.41, 15.19)
Find the necessary sample size.
2) A population is normal with a variance of 99, Suppose you wish to estimate the population mean p.
Find the sample size needed to assure with 68 26 per cent confidence that the sample mean will not
differ from the population mean by more than 4 units.
A) 9
2)
B) 7
C) 613
D) 25
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
3) A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature.
Construct the 95% confidence interval for the true proportion of all votersin the state who favor
approval.
A) 0.438 <p < 0.505
C) 0.471 <p < 0.472
3)
B) 0.444 <p < 0.500
D) 0.435 <p < 0.508
Solve the problem.
4) A pollster wishes to estimate the true proportion of U.S. voters that oppose capital punishment.
How many voters should be surveyed in order to be 96 percent confident that the true proportion is
estimated to within 0.02?
4)
A) 2627
B) 53
C) 2626
D) 1
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ơ.
A ssume that the population has a normal distribution.
5) The mean replacement time for a random sample of 20 washing machines is 9.0 years and the
standard deviation is 2.4 years. Construct a 99% confidence interval for the standard deviation, o,
of the replacement times of all washing machines of this type.
A) 1.7 yr <o< 5.0 yr
C) 1.7 yr < o<3.8 yr
5)
B) 1.6 yr <o< 4.6 yr
D) 1.7 yr <o< 4.0 yr
erth o
Compute the test statistic used to test the null hypothesis that p1 = P2.
6) n1 = 156
n2 = 148
6)
X1 = 75
X2 = 67
A) 11.102
B) 0.490
C) 0.480
D) 5.978
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Use the traditional method to test the given hypothesi s. A ssume that the samples are independent and that they have
been randomly sel ected (SHOW ALL WORK in the space provided)
1
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