SOLUTION: The heights of 220 summer camp attendees are normally distributed with a mean of 62.4 inches and a standard deviation of 3.7 inches. About how many attendees could be expected to b
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Question 908395: The heights of 220 summer camp attendees are normally distributed with a mean of 62.4 inches and a standard deviation of 3.7 inches. About how many attendees could be expected to be shorter than inches?
A. 5
B. 35
C. 150
D. 215
I'm thinking it's A but not sure. Could someone help? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The heights of 220 summer camp attendees are normally distributed with a mean of 62.4 inches and a standard deviation of 3.7 inches. About how many attendees could be expected to be shorter than 55 inches?
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z(55) = (55-62.4)/3.7 = -2
P(x < 55) = P(z < -2) = normalcdf(-100,-2) = 0.0228
Ans:: 0.0228*220 = 5 when rounded up
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Cheers,
Stan H.
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A. 5
B. 35
C. 150
D. 215
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