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 o
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Question 728372: 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 ¾ inches. What is the chance of getting a “fast” standard ball?
PLEASE PROVIDE A STEP BY STEP SOLUTION FOR BETTER UNDERSTANDING 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 ¾ inches.
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What is the chance of getting a “fast” standard ball?
z(32) = (32-30)/(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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