Question 1
(CO 4) 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%
confidenc
...
Question 1
(CO 4) 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)
(5.71, 5.89)
(5.73, 5.87)
(5.72, 5.88)
Question 1
(CO 4) From a random sample of 68 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)
(5.71, 5.89)
(5.73, 5.87)
(5.72, 5.88)
Question 2
(CO 4) If a confidence interval is given from 8.52 to 10.23 and the mean is known to be 9.375, what is
the margin of error?
0.428
1.710
8.520
0.855
Question 3
(CO 4) Which of the following is most likely to lead to a small margin of error?
large sample size
small mean
small standard deviation
large maximum error
Question 4
(CO 4) From a random sample of 85 teens, it is found that on average they spend 31.8 hours each week
online with a population standard deviation of 5.91 hours. What is the 90% confidence interval for the
amount of time they spend online each week?
(30.62, 32.99)
(19.98, 43.62)
(30.75, 32.85)
(25.89, 37.71)
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