Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

تمرين 32

Use the relations in Section 19.4 for continuous variables to determine the expected value and standard deviation for the distribution of f ( D Y ) in Problem 19.10. b) It is possible to calculate the probability of a continuous variable X between two points ( a , b ) using the following integral:
Determine the probability that D Y is within 2 standard deviations of the expected value.