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Confidence in banks: A news poll conducted in 2012 asked a random sample of 1268 adults in the United States how much confidence they had in banks and other financial institutions. A total of 144 adults said that they had a great deal of confidence. An economist claims that less than 11% of U.S. adults have a great deal of confidence in banks. Can you conclude that the economist's claim is true? Use both a = 0.05 and a=0.10 levels of significance and the critical value method with the table. Part 1 of 5 State the appropriate null and alternate hypotheses. H, p = .11 H: p<.11 This hypothesis test is a left-tailed test. Part 2 of 5 Find the critical values. Round the answer to three decimal places. For a = 0.05, the critical value is -1.645 For a=0.10, the critical value is -1.282 Part 3 of 5 Compute the test statistic. Do not round intermediate calculations. Round the answer to two decimal places. -= 0.41 Part: 3/5 Part 4 of 5 Determine whether to reject H.. At the a= 0.05 level, (Choose one) the null hypothesis H. At the a=0.10 level, (Choose one) the null hypothesis H.

Answer 1

parts parts Ho [p=011] H, [bcoll] Part 2 the critical Velie x=cos o.lix0.89 Critical reson The hypothesis is a [lett-tailed / test lobur part 3 The Eritical values : For a=o0s, the critical For a = 0.10 The criticalvare 1.282 * = 404 30:1136 2 Brokerage 0011360400 - 41 You set 0:41X0.89 part 4 : Reject to it a z enticandra foratt-tould test 1.282 2 - the d=0.05 level the statistic Do not reject the to At the a=0/0 love fail to reject the to... parts Conclusion : The claim is not true . ie propotion is less than is not true. 117