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It is known that the average score of PGA golfers is 72.13 with a standard deviation...

It is known that the average score of PGA golfers is 72.13 with a standard deviation of 8.825. A random sample of 48 golfers is taken.

a. What is the probability that the sample average score of the random sample of 48 golfers is less than 73? b. There is an 86% chance that the average score of the random sample of 48 golfers is more than ___________.

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