Stats HW 9 - core for this quiz 99.94 out of 99.94 Submitted Mar 5 at 11:19pm This attempt took 4657 minutes Question 1 2.63 2.63 pts Skip to question

# Stats HW 9 - core for this quiz 99.94 out of 99.94...

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core for this quiz: 99.94out of 99.94Submitted Mar 5 at 11:19pmThis attempt took 4657 minutes.Question 12.63 / 2.63 ptsSkip to question text.The U.S. Bureau of Labor Statistics () released its Consumer Expenditures report in October 2008. Among its findings is that average annual household spending on food at home was \$3,624. Suppose a random sample of 137 households in Detroit was taken to determine whether the average annual expenditure on food at home was less for consumer units in Detroit than in the nation as a whole. The sample results are in the file Detroit Eats. Based on the sample results, can it be concluded at the α=0.02 level of significance that average consumer-unit spending for food at home in Detroit is less than the national average?Because t=-15.7648 is less than the critical t value of -2.0736, do not reject H0.The annual average consumer unit spending for food at home in Detroit is not less than the 2006 national consumer unit average.Correct!Because t=-15.7648 is less than the critical t value of -2.0736, reject H0.The annual average consumer unit spending for food at home in Detroit is less than the 2006 national consumer unit average.Because t=-13.2314 is less than the critical t value of -1.4126, reject H0.The annual average consumer unit spending for food at
home in Detroit is less than the 2006 national consumer unit averageBecause t=-13.2314 is less than the critical t value of -1.4126, do not reject H0.The annual average consumer unit spending for food at home in Detroit is not less than the 2006 national consumer unit averageQuestion 22.63 / 2.63 ptsSkip to question text.A company that sells an online course aimed at helping high-school students improve their SAT scores has claimed that SAT scores will improve by more than 90 points on average if students successfully complete the course. To test this, a national school counseling organization plans to select a randomsample of n =100 students who have previously taken the SAT test. These students will take the company's course and then retake the SAT test. Assuming that the population standard deviation for improvement in test scores is thought to be 30 points and the level of significance for the hypothesis test is 0.05, find the critical value in terms of improvement in SAT points, which would be needed prior to finding a beta.Reject the null if SAT improvement is >95 points.Correct!Reject the null if SAT improvement is >94.935 points.Reject the null if SAT improvement is >95.88 points.
Reject the null if SAT improvement is 85.065 points.Question 32.63 / 2.63 ptsSkip to question text.According to CNN business partner Careerbuilder.com, the average starting salary for accounting graduates in 2008 was at least \$47,413. Suppose that the American Society for Certified Public Accountants planned to test this claim by randomly sampling 200 accountants who graduated in 2008.

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