A poll conducted by the General Social Survey asked a random sample of 1325 adults in the United States how much confidence they had in banks and other financial institutions. A total of 149 adults said that they had a great deal of confidence. An economist claims that less than 15% of U.S. adults have a great deal of confidence in banks. a. State the appropriate null and alternative hypotheses. b. Compute the test statistic z. c. Using a = 0.05, can you conclude that the executive's claim is true? d. Using a = 0.01, can you conclude that the executive's claim is true?
A poll conducted by the General Social Survey asked a random sample of 1325 adults in the United States how much confidence they had in banks and other financial institutions. A total of 149 adults said that they had a great deal of confidence. An economist claims that less than 15% of U.S. adults have a great deal of confidence in banks. a. State the appropriate null and alternative hypotheses. b. Compute the test statistic z. c. Using a = 0.05, can you conclude that the executive's claim is true? d. Using a = 0.01, can you conclude that the executive's claim is true?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A poll conducted by the General Social Survey asked a random sample of 1325 adults in the United States how much confidence they had in banks and other financial institutions. A total of 149 adults said that they had a great deal of confidence. An economist claims that less than 15% of U.S. adults have a great deal of confidence in banks.
a. State the appropriate null and alternative hypotheses.
b. Compute the test statistic z.
c. Using a = 0.05, can you conclude that the executive's claim is true?
d. Using a = 0.01, can you conclude that the executive's claim is true?
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