Use the following information to answer questions 1 through 9. Bill claims that he spends an average of one hour or more

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Use The Following Information To Answer Questions 1 Through 9 Bill Claims That He Spends An Average Of One Hour Or More 1 (48.5 KiB) Viewed 30 times

Use the following information to answer questions 1 through 9. Bill claims that he spends an average of one hour or more on His wife, Mary doubts his claim. She randomly records eleven weeks of Bills chore household chores. time. 70 22 54 57 56 47 12 60 43 10 56 1) What is point estimate of the Bill's mean chore time? 2) The sample standard deviation, s, is: a) 11.8 b) 13.7 c) 19.5 d) 20.4 e) 23.1 £) 28.4 3) Find the 90% confidence interval for Bill's mean chore time. 4) Find the 99% confidence interval for Bill's mean chore time. 5) Mary believes that Bill's mean chore time is less than 60 minutes. What is the appropriate null and alternative hypothesis to support the Mary's belief? 6) Use a 5% level of significance to support Mary's belief. The decision rule is: a) Reject if z>1.96 b) Reject if z<-1.96 Reject if t>1.812. c) d) Reject if t<-1.812 e) Reject if t>2.131 or t<-2.131 f) Reject if t<-1.753 or t 1.753 g) Reject if z>1.645 or z<-1.645 h) Reject if t>2.228 i) Reject if t<-2.228 j) None of the above 7) The standardized test statistic for this problem equals: 2.5 a) b) -2.5 c) -1.7 d) 1.7 e) 2.6 f) -2.6 g) -1.1 h) 1.1 i) -3.2 j) 3.2