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**That Guy** Calculate the following errors for the following tow cases:

(a) If the cholesterol level of healthy men is normally distributed with a mean of 180 and a standard deviation of 20, and men with cholesterol levels over 225 are diagnosed as not healthy, what is the probability of a type one error?

(b) If men predisposed to heart disease have a mean cholesterol level of 300 with a standard deviation of 30, but only men with a cholesterol level over 225 are diagnosed as predisposed to heart disease, what is the probability of a Type II error (null Hypothesis is that a person is not predisposed to heart disease).

An help on this one would be great!

thanks