1) "If normal random variable from a normally distributed population with mean 21 and standard deviation 4, is 15. The value of standard normal random variable will be ____________"

a) -1.5

b) 1.5

c) 2.4

d) -2.4

2) A Project Manager determined that T is a continuous random variable indicating the project completion time. Find expected value of project completion time. The probability density function (PDF) of T , i.e. f(t) is given by : "

a) 0.674

b)0.567

c) 1

d) 0.775