Question 616852
The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. what is the probabiity that the diameter will exceed 0.815 inch?
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How many standard deviations is 0.815 from the mean?
z(0.815) = (0.815-0.8)/0.01 = 1.5
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What is the probability that z could be greater than 1.5?
P(x > 0.0815) = P(z > 1.5) = normalcdf(1.5,100) = 0.06681
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Cheers,
Stan H.