Unit 4(B) - binomial and geo dist

Question 1

Properties of a binomial dist

Answer 1

Two poss outcomes - success or failure
independent trials
FIXED NUMBER OF TRIALS
Each trial has same prob of success

Question 2

How to find the prob of getting exactly x successes in N trial

Answer 2

BPD

Question 3

Properties of geo dist

Answer 3

Two poss outcomes - success or failure
Intendent trials
NO FIXED NUMBER OF TRIALS
Each trial has same prob of success

Question 4

Formula for geo prob (trying to find when the first occurrence happ)

Answer 4

P(x) = (1-p)^x-1 * p