Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. 3) A survey of 865 votersin one state reveals that 408 favor approval of an issue before the legislature. 3) Construct the 95% confidence interval for the true proportion of all votersin the state who favor approval. A) 0.438
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. 3) A survey of 865 votersin one state reveals that 408 favor approval of an issue before the legislature. 3) Construct the 95% confidence interval for the true proportion of all votersin the state who favor approval. A) 0.438
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
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Transcribed Image Text:the ponule gre of confidence and sampledatato construct a confidenceinterval for the population meanH.A ssume
1) n = 10, x = 13.8, s = 2.4, 95 percent
A) (12.11, 15.49)
1)
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 vou wish to estimate the population mean p.
Find the sample size needed to assure with 68 26 percent confidence that the sample mean wili hot
differ from the population mean by more than 4 units.
A) 9
2)
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.
3) A survey of 865 votersin one state revealsthat 408 favor approval of an issue before the legislature.
Construct the 95% confidence interval for the true proportion of all voters in 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 o.
Assume 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
Compute the test statistic used to test the null hypothesis that p1 = P2.
n2 = 148
X2 = 67
6) n1 = 156
6)
X1 = 75
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 areindependent and that they have
been randomly sel ected (SHOW ALL WORK in the space provided)
1
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