SOLUTION: Error Analysis.The error in measuring the diameter of a large tree in inches is normal(-0.25,0.5).Find the probability that the error is between -1 and 1 inches.

Question 698348: Error Analysis.The error in measuring the diameter of a large tree in inches is normal(-0.25,0.5).Find the probability that the error is between -1 and 1 inches.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Error Analysis.The error in measuring the diameter of a large tree in inches is normal(-0.25,0.5).Find the probability that the error is between -1 and 1 inches.
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z(-1) = (-1--0.25)/0.5 = -0.75/0.5 = -1.5
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z(1) = (1--0.25)/0.5 = 1.25/0.5 = 2.5
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P(-1< x <1) = P(-1.5< z < 2.5) = normalcdf(-1.5,2.5) = 0.9270
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Cheers,
Stan H.
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