Question

Which of the following is a valid probability distribution for a discrete random variable? Check all that apply.

A. 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1

B. 0.18, 0.12, 0.03, -0.08, 0.21, 0.04, -0.34, 0.05, 0.16, 0.25, 0.21, 0.17

C. 0.21, 0.16, 0.05, 0.04, 0.03, 0.12, 0.21, 0.18

D. 0.02, 0.03, 0.21, 0.16, 0.04, 0.12, 0.18, 0.05, 0.16, 0.05

E. 1.0

(There's more than one answer)

Answer 1

A - probabilities are all between 0 and 1 and add to 1 *CHECK*
B - probabilities are NOT all between 0 and 1
C - probabilities are all between 0 and 1 and add to 1 *CHECK*
D - probabilities are all between 0 and 1 and add to 1 *CHECK*
E - probabilities do NOT add to 1

Answer 2

Thanks ! :)

Answer 3

Since D equals 1.02, that doesn't count as one right ? And why isn't E an answer ?

Answer 4

they never add to 1

Answer 5

what do you mean ?