Chapter 4.8, Problem 4.138LM

(a)

To determine

To find: The probability that X assumes a value more than 3 standard deviations from $\mu$.

(b)

To determine

To find: The probability that X assumes a value less than 2 standard deviations from $\mu$.

(c)

To determine

To find: The probability that X assumes a value within half a standard deviation from $\mu$.