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1.)A water treatment plant needs to maintain the pH of the water in the reservoir at a certain level. To monitor

this, they take 2 oz. of water at 37 locations every hour, measure the pH at each of those locations, and find their average. If the pH level of the reservoir is ok, the results at each location will have varying results, with an average pH of 8.5 and a standard deviation of 0.22. If the pH level of the reservoir is ok, what is the probability that the sample average is MORE than 8.40?

2.) Twenty-nine percent of Americans say they are confident that passenger trips to the moon will occur in their lifetime. You randomly sample 200 Americans and ask if they believe passenger trips to the moon will occur in their lifetime. What is the probability that less than 40% of the people sampled will answer Yes to the question?

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1) P ( X > 8 . 4 ) = 0 . 9 9 7 2 2) ... View the full answer

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