Type 1 and 2 Errors

Question 1

Type I Error

Answer 1

Rejecting the null when in fact the null is true

Question 2

Type II Error

Answer 2

Accepting a null when it’s false

Question 3

What is power?

Answer 3

The probability that a fixed level (alpha) significance test will reject the null when a particular alternative value of the parameter is true

Question 4

What does power do?

Answer 4

Gives the probability of correctly rejecting the null when in fact the null should be rejected