Stats, the binomial distribution

Question 1

What are the conditions for data to be modelled by a binomial distribution?

Answer 1

Independent and constant probability

Question 2

What is the formula for a binomial PD probability p(X = r)?

Answer 2

X-B (n,p)
p(X = r) = nCr . p(success)ʳ . p(failure)ⁿ⁻ʳ

Question 3

What is the critical region?

Answer 3

Values in a hypothesis test that would reject the null hypothesis

Question 4

When conducting a two tail test, how do you choose what too test?

Answer 4

If test stat is > mean, test top with Slevel/2%

If test stat is < mean, test bottom with Slevel/2%