Mathematics > EXAM > Math 221 week 5 quiz 20 points (All)

Math 221 week 5 quiz 20 points

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Due Oct 7 at 11:59pm Points 40 Questions 20 Available Sep 30 at 2am - Oct 27 at 11:59pm 28 days Time Limit None Allowed Attempts Unlimited Instructions Attempt History Attempt Time Score KEPT At tempt 6 59 minutes 28 out of 40 LATEST Attempt 6 59 minutes 28 out of 40 Attempt 5 66 minutes 28 out of 40 Attempt 4 3 minutes 12 out of 40 Attempt 3 65 minutes 26 out of 40 Attempt 2 17 minutes 22 out of 40 Attempt 1 1 minute 4 out of 40  Correct answers are hidden. Score for this attempt: 28 out of 40 Submitted Oct 13 at 12:04pm This attempt took 59 minutes. Click here to work on the homework set. You can re-do this assignment as often as you need. Be sure to have the Week 5 spreadsheet available to help with the calculations. It is provided in Week 5: Resources. Take the Quiz Again Question 1 2 / 2 pts From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a Top 10/13/2018 Week 5: Homework: Statistics for Decision-Making - 10586 https://devryu.instructure.com/courses/31509/quizzes/96248 2/10 standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? (20.93, 22.46) (21.78, 22.60) (20.71, 22.67) (19.24, 24.14) Question 2 2 / 2 pts If a confidence interval is given from 43.8 up to 62.0 and the mean is known to be 52.9, what is the maximum error? 43.8 4.6 18.2 9.1 Question 3 2 / 2 pts If a shirt manufacturer wanted to make shirts that fit most individuals, what characteristics would be better? wide confidence interval so shirts fit most individuals narrow confidence interval so shirts fit few individuals Top 10/13/2018 Week 5: Homework: Statistics for Decision-Making - 10586 https://devryu.instructure.com/courses/31509/quizzes/96248 3/10 wide confidence interval so shirts fit few individuals narrow confidence interval so shirts fit most individuals IInccorrrreecctt Question 4 0 / 2 pts Which of the following are most likely to lead to a wide confidence interval? large standard deviation large mean large sample size small standard deviation IInccorrrreecctt Question 5 0 / 2 pts If you were designing a study that would benefit from a narrow range of data points, you would want the input variable to have: a small mean a small maximum error a large standard deviation a small Tsoampple size 10/13/2018 Week 5: Homework: Statistics for Decision-Making - 10586 https://devryu.instructure.com/courses/31509/quizzes/96248 4/10 Question 6 2 / 2 pts The 95% confidence interval for these parts is 56.98 to 57.05 under normal operations. A systematic sample is taken from the manufacturing line to determine if the production process is still within acceptable levels. The mean of the sample is 57.06. What should bedone about the production line?

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