The mean age of CEO is 56 years If we know that this variabl

The mean age of CEO is 56 years. If we know that this variable is normally distributed with a standard deviation of four years, then approximately what percentage of all CEOs are younger than 48 years old?

mean = 56

std dev = 4

For x = 48, the z-value z = (48 - 56) / 4 = 2

Hence P(x < 48) = P(z < 2) = [area to the left of 2.0] = 0.9772 = 97.72%

The mean age of CEO is 56 years. If we know that this variable is normally distributed with a standard deviation of four years, then approximately what percenta

The mean age of CEO is 56 years If we know that this variabl

Solution

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