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, σ is known, and alpha = .01, the critical value of z isa) 2.575b) -2.575c) 2.33d) -2.33e) 2.45

c) 2.33

Step-by-step explanation:

Given that 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.

(Right tailed hypothesis test for population mean at 1% significance level)

Sample size = 8

Since this is one tailed, the critical value of Z for 100-1 = 99% would be

c) 2.33

It is positive because right tailed test, and it is 2.33 because cumulative prob of 2.33 under Z is 99%

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system