Compute the test statistic used to test the null hypothesisthat p1 = P2- 6) n1 = 156 n2 = 148 %3D X1 = 75 X2 = 67 A) 11.102 B) 0.490 C) 0.480 D) 5.978

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3) A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legis.
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
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?
D) 1
A) 2627
B) 53
C) 2626
Ose the given degree of confidence and sampledata to find a confidence interval for the population standard deviation ở.
Assume that the population has a normal distribution.
5)
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, ơ,
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
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.
6)
6) n1 = 156
X1 = 75
A) 11.102
n2 = 148
X2 = 67
D) 5.978
B) 0.490
C) 0.480
210
SHORT ANSWER. Write the word or phrase that best completes each statement or answ ers the question.
Use the traditional method to test the given hypothesis. A Ssume that the samples areindependent and that they have
been randomly sel ected (SHOW ALL WORK in the space provided)
1
Transcribed Image Text:3) A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legis. 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 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? D) 1 A) 2627 B) 53 C) 2626 Ose the given degree of confidence and sampledata to find a confidence interval for the population standard deviation ở. Assume that the population has a normal distribution. 5) 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, ơ, 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 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. 6) 6) n1 = 156 X1 = 75 A) 11.102 n2 = 148 X2 = 67 D) 5.978 B) 0.490 C) 0.480 210 SHORT ANSWER. Write the word or phrase that best completes each statement or answ ers the question. Use the traditional method to test the given hypothesis. 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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