Question 516685
mean of 22 feet height and standard deviation is 4 feet 
A. what is the probability that the height is greater than 17
z(17) = (17-22)/4 = -5/4
P(x > 17) = P(z > -5/4) = 0.8944 
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B. height is less than 13 feet
z(13) = (13-22)/4 = -9/4
P(x < 13) = P(z < -9/4) = 0.122 
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C. the height is between 25 and 31 feet
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Find the z value of 25 and of 31.
The find the probability that z is between those two values.
Ans: 0.2144
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Cheers,
Stan H.
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