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Having trouble with this, thank you 1. Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a

Having trouble with this, thank you

1. Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 255 feet and a standard deviation of 49 feet. We randomly sample 51 fly balls.

a)What is the probability that 51 balls traveled an average of less than 240 feet?

b)Find the 80thpercentile of the distribution of the average of 51 fly balls.

c)What is the probability that 51 balls traveled an average of at least 309 feet?

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