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Given that the random variable x is normally distributed with a mean of 80 and a standard deviation of 10, p(85 < x < 90) is
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Given that the random variable x is normally distributed with a mean of 80 and a standard deviation of 10, p(85 < x < 90) is

User Dilson
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I'd do this by using the normalcdf probability distribution function on my TI-83 Plus calculator: normalcdf(85,90,80,10). Result: 0.1499.

You could also do this problem using z-scores.
User Non Communist Mao
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