Question

which of the following are valid probability distributions for a discrete random variable? check all that apply

Answer 1

A. 0.16 + 0.193 + 0.222 + 0.233 + 0.067 + 0.125 = 84
probabilities are all between 0 and 1 but does not add to 1.
B. 0.35+0.18+ 0.21+ 0.06+ 0.17+ 0.03 = 1
probabilities are all between 0 and 1 and also add to 1.
C. (0.01) 11+ (0.01) 12+ (0.01) 13 = 0.11+0.12+0.13 =0.36
probabilities are all between 0 and 1 but does not add to 1.
D. 0.16+0.12+ 0.02+ 0.08+ 0.22+ 0.05+ 0.15+ 0.02+ 0.18 = 1
probabilities are all between 0 and 1 and also add to 1.
E. 0.12-0.02+0.18+0.08+0.15+0.05+0.16+0.27+0.02+ 0.36 -0.15 -0.22 =1
probabilities are all between 0 and 1 and also add to 1.

Answer 2

Answer:

I think it's D.