For the following z test statistic compute the p value assuming that the

For the following z test statistic compute the p

This preview shows page 14 - 19 out of 19 pages.

Question 28For the following z-test statistic, compute the p-value assuming that thehypothesis test is a one-tailed test: z = -1.55.
Image of page 14
8/23/2015 Chap 9 Graded HW: OIS 2340-090 Summer 2015 Business Statistics data:text/html;charset=utf-8,%3Cdiv%20id%3D%22questions%22%20class%3D%22assessment_results%20%20show_correct_answers%22%20style%3D%22cle… 15/19 0.0172 0.0901 0.1512 0.0606 Correct! 2.63 / 2.63 ptsQuestion 29For the following z-test statistic, compute the p-value assuming that thehypothesis test is a one-tailed test: z Correct! 2.63 / 2.63 ptsQuestion 30The manager of an online shop wants to determine whether the mean lengthof calling time of its customers is significantly more than 3 minutes. Arandom sample of 100 customers was taken. The average length of callingtime in the sample was 3.1 minutes with a standard deviation of 0.5 minutes.At a 0.05 level of significance, it can be concluded that the mean of thepopulation is:
Image of page 15
8/23/2015 Chap 9 Graded HW: OIS 2340-090 Summer 2015 Business Statistics data:text/html;charset=utf-8,%3Cdiv%20id%3D%22questions%22%20class%3D%22assessment_results%20%20show_correct_answers%22%20style%3D%22cle… 16/19 not significantly greater than 3. not significantly different from 3.10. 2.63 / 2.63 pts Question 31The power of a test is measured by its capability of: Correct! 0 / 2.63 pts Question 32If thepvalue is less than α in a two-tailed test,a one-tailed test should be used. the null hypothesis should not be rejected.You Answeredthe null hypothesis should be rejected.Correct AnswerMore information is needed to reach a conclusion about thenull hypothesis.
Image of page 16
8/23/2015 Chap 9 Graded HW: OIS 2340-090 Summer 2015 Business Statistics data:text/html;charset=utf-8,%3Cdiv%20id%3D%22questions%22%20class%3D%22assessment_results%20%20show_correct_answers%22%20style%3D%22cle… 17/19 0 / 2.63 pts Question 33Which of the following statements is true? 2.63 / 2.63 ptsQuestion 34The makers of Mini-Oats Cereal have an automated packaging machine thatcan be set at any targeted fill level between 12 and 32 ounces. Every box ofcereal is not expected to contain exactly the targeted weight, but the averageof all boxes filled should. At the end of every shift (eight hours), 16 boxes areselected at random and the mean and standard deviation of the sample arecomputed. Based on these sample results, the production control managerdetermines whether the filling machine needs to be readjusted or whether itremains all right to operate. Useα=0.05. Establish the appropriate null andalternative hypotheses to be tested for boxes that are supposed to have anaverage of 24 ounces.
Image of page 17
8/23/2015
Image of page 18
Image of page 19

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture