Multiple Choice Please select the best answer and click subm

Multiple Choice: Please select the best answer and click \"submit.\" The following table shows the probability distribution for a discrete random variable. What is the mean of this discrete random variable? That is. what is E(X), the expected value of X? 31.29 30.47 28.5 29.5

Solution

The mean of the discrete random variable is 23*0.16 + 25*0.09+26*0.18+31*0.12+34*0.24+38*0.21 = 3.68 + 2.25+ 4.68+3.72+8.16+7.98 = 30.47. The answer is B