Question

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

A. 0.18, 0.12, 0.03, -0.08, 0.21, 0.04, -0.34, 0.05, 0.16, 0.25, 0.21, 0.17
B. 0.02, 0.03, 0.21, 0.16, 0.04, 0.12, 0.18, 0.05, 0.16, 0.05
C. 0.21, 0.16, 0.05, 0.04, 0.03, 0.12, 0.21, 0.18
D. 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1
E. 1.0

Answer 1

@Euler271

Answer 2

my guess is E D C ?

Answer 3

I don't know lol tbh.

If i'd guess, all except A since A contains negative values

Answer 4

I think B is ok. what's wrong with it?

Answer 5

probabilities are between 0 and 1 inclusively

Answer 6

its over 1 .

Answer 7

it was right, :)

Answer 8

with or without B?

Answer 9

without

Answer 10

oh they add up > 1 i c

Answer 11

They must sum to 1 and all be positive for to be a valid probability distribution; clearly A is out, while D, E so far make sense. B if you check sums up to 1.02 so it is invalid while C sums correctly. I'd say then that the correct answers are C,D,E

A. 0.18, 0.12, 0.03, -0.08, 0.21, 0.04, -0.34, 0.05, 0.16, 0.25, 0.21, 0.17
B. 0.02, 0.03, 0.21, 0.16, 0.04, 0.12, 0.18, 0.05, 0.16, 0.05
C. 0.21, 0.16, 0.05, 0.04, 0.03, 0.12, 0.21, 0.18
D. 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1
E. 1.0

Answer 12

@oldrin.bataku yup! :)