SOLUTION: A hundred squash balls are tested by dropping from a height of 100 inches and measuring the height of the bounce. A ball is fast if it rises above 32 inches. The average height of
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Question 723818: A hundred squash balls are tested by dropping from a height of 100 inches and measuring the height of the bounce. A ball is fast if it rises above 32 inches. The average height of bounce was 30 inches and the standard deviation was 3/4 inches. What was the chance of getting a fast standard ball ? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A hundred squash balls are tested by dropping from a height of 100 inches and measuring the height of the bounce. A ball is fast if it rises above 32 inches. The average height of bounce was 30 inches and the standard deviation was 3/4 inches. What was the chance of getting a fast standard ball ?
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z(32) = (32-30)/(3/4) = 2/(3/4) = 8/3
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P(x > 32) = P(z > 8/3) = normalcdf(8/3,100) = 0.0038
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Cheers,
Stan H.
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