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Traveled an average of less than 240 feet

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Reference no: EM131941986

Statistics. Please assist with the following. Suppose the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. Randomly sample 49 fly balls.

b. What is the probability that 49 balls traveled an average of less than 240 feet? Sketch a graph. Scale the horizontal axis for X. Shade the region corresponding to the probability. Find the probability.

c. Find the 80th percentile of the distribution of the average 49 fly balls.

2.A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ test, what is the probability that the sample mean scores will be between 85 and 125 points.

Please explain the above questions.

Reference no: EM131941986

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