Question: The mean level of new flu cases per week in Star County is 22 (SD=1.5). However, among a sample of 144 residents who live in Mira City, which is located in Star County, the mean level of new flu cases per week is 26.

(Points for each sub-item are provided below; 10 points total)

1. Present the H _a (2–tailed) for this study.

b. Present the H _o for this study.

c. Calculate the z –test. Show all your calculations. No credit will be given without this information.

d. Draw conclusions based upon comparing your calculated z with the critical z of +/–1.96. Indicate if the null hypothesis should be retained or rejected. Explain whether the mean number of flu cases per week in Star County and Deneb City are significantly different.

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