The recommended amount of water a person should drink is eight 8-oz servings per day. a. Does
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a. Does the sample of educational professionals in Exercise
8.163 show sufficient evidence that the education professionals consume, on average, significantly less water daily than the recommended amount? Use a = 0.05.
b. The value of the calculated z-score in part a is unusual. In what way is it unusual, and what does that mean?
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