Math Is Fun Forum

SleepDeprived

Member

Registered: 2022-10-29

Posts: 2

Probability Distribution

I have these 3 tables and can anyone explain it to me whether each of these tables shows a correct probability distribution? many thanks!

x        1      2      3     4     5
P(x) 0.10 0.20 0.25 0.40 0.05

x        1      2      3    4     5
P(x) 1/10 3/10 1/5 3/10 1/10

x        1      2      3     4     5
P(x) 0.05 -0.30 0.35 0.40 0.50

Last edited by SleepDeprived (2022-10-29 20:32:03)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: Probability Distribution

Hi SleepDeprived

Welcome to the forum.

To be a probability distribution the probabilities should all be between 0 and 1 and should add to a total of 1. That makes sure that every outcome is properly covered.

Only one of the questions obeys this rule.

Hope this helps you to get some sleep.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob