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The Manager of the Local Health Club Is Interested in Determining

Question 120

Multiple Choice

The manager of the local health club is interested in determining the number of times members use the weight room per month.She takes a random sample of 15 members and finds that over the course of a month,the average number of visits was 11.2 with a standard deviation of 3.2.Assuming that the monthly number of visits is normally distributed,which of the following represents a 95% confidence interval for the average monthly usage of all health club members?


A) 11.2 ± 1.74
B) 11.2 ± 1.77
C) 11.2 ± 1.62
D) 11.2 ± 1.83

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