The local swim team is considering offering a new semi-private class aimed at entry-level swimmers, but needs a minimum number of swimmers to sign up in order to be cost effective.Last year's data showed that during 8 swim sessions the average number of entry-level swimmers attending was 15.Suppose the instructor wants to conduct a hypothesis test and the alternative hypothesis is "the population mean is greater than 15." If the sample size is 5,$\sigma$ is known, and α = .01, the critical value of z is _______.
A)2.575
B)-2.575
C)2.33
D)-2.33
E)2.45

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The Answer of The local swim team is considering offering a new semi-private class aimed at entry-level swimmers, but needs a minimum number of swimmers to sign up in order to be cost effective.Last year's data showed that during 8 swim sessions the average number of entry-level swimmers attending was 15.Suppose the instructor wants to conduct a hypothesis test and the alternative hypothesis is "the population mean is greater than 15." If the sample size is 5,$\sigma$ is known, and α = .01, the critical value of z is _______.
A)2.575
B)-2.575
C)2.33
D)-2.33
E)2.45

The Local Swim Team Is Considering Offering a New Semi-Private σ\sigmaσ

The Local Swim Team Is Considering Offering a New Semi-Private $\sigma$