Exam (elaborations)
DeVry University, Naperville MATH 221 Math 221 Week 7 Quiz
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Question 1 2 / 2 pts (CO6) From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? (5.74, 5.90) (5.73, 5.87) (5.72, 5.88) Correct! (5.71, 5.89) Question 2 0 / 2 pts (CO6) If a confidence interval is given from 8.54 to 10.21 and the mean is known to be 9.375, what is the maximum error? You Answered 8.540 0.418 Correct Answer 0.835 1.670 See text page 301 Question 3 0 / 2 pts (CO6) Which of the following is most likely to lead to a large maximum error? You Answered large sample size Correct Answer small sample size
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Institution
Devry University
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Statistics Math 221
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Statistics Math 221
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