Multiple comparisons

Question 1

What is the definition of a p value

Answer 1

result occuring by chance if the null hypothesis is correct

Question 2

Why is multiple testing bad

Answer 2

it increases the risk of type 1 error

Question 3

What is analysis of variance

Answer 3

a statistical test that tests whether two or more population means are equal - it generalises a t-test beyond 2 means

Question 4

What assumptions need to met to perform an analysis of variance test

Answer 4

independent variable needs to be categorical
dependent variable needs to be continuous

there should be no relationship between independent groups or observations within groups