MATH 221 Quiz Week 7 : DeVry University, New York - Worth 60 Points.
WEEK 7: QUIZ Points 60 Questions 30 Time Limit 120Minutes Instructions Here is some information about your quiz or exam. This quiz covers Weeks 5 and 6, Chapters 6 and 7, and Course Objectives (COs) 6 and 7. This quiz has 30 multiple choice questions worth 2 points each for a total value of 60 points. You have 120 minutes to finish this quiz. When the time limit is reached you will be exited from the exam. Attempt History Attempt Time Score LATEST Attempt 1 84 minutes 30 out of 60 Score for this quiz: Corrected 60 out of 60 Submitted Oct 16 at 8:50pm This attempt took 84 minutes. CO6) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 45.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? (5.71, 5.89) (5.74, 5.90) Question 1 2 / 2 pts S - The Marketplace to Buy and Sell your Study Material Correct! (5.72, 5.88) (5.73, 5.87) Correct! (CO6) If the standard deviation of a sample decreases without other changes, what is most likely to happen to the confidence interval? widens You Answered cannot determine does not change Correct Answer narrows Question 2 2 / 2 pts 0.875
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