3.5 Binomial Distribution

Question 1

Equation to calculate expected value

Answer 1

E.v = np

Where n is number of trials
And p is the probability

Question 2

The general layout of binomial distribution

Answer 2

X~B(n, p)

Question 3

When do you use binomial distribution

Answer 3

• 2 possible outcomes eg success/failure
• trial repeated n times
• trials are independent
• probability of success is p and this is constant for all trials

Question 4

How to calculate binomial distribution

Answer 4

P(X=x) = (nCr)(p^x)(q^n-x)