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# According to Investment Digest "(Diversification and the Risk/Reward relationship "Winter 1994 ,1-3)the mean of the annual return of common stocks...

According to Investment Digest "(Diversification and the Risk/Reward relationship "Winter 1994 ,1-3)the mean of the annual return of common stocks from 1926-1992 was 16.5 % and the standard deviation of the annual return was 19%. What was the probability that the stocks are return greater than 0% but less than 18%.

What is the area between the mean and our actual score?