Type I and II Errors

Question 1

How can you remember the difference between Type I and iI Errors?

Answer 1

Boy Who Cried Wolf

Question 2

What is Type I Error?

Answer 2

You believe there is an effect but there is NOT.

Question 3

What is Type II Error?

Answer 3

You don’t believe there is an effect but there IS.

Question 4

What is another name for Type I Error?

Answer 4

Alpha

False-positive error

Question 5

What is another name for Type II Error?

Answer 5

Beta

False-negative error

Question 6

What happens with the null hypothesis in a type I error?

Answer 6

Null hypothesis is incorrectly rejected in favor of alternate hypothesis.

Question 7

What happens with the null hypothesis in a type II error?

Answer 7

Null hypothesis is not rejected when it is in fact false.

Question 8

What is the Null H0?

Answer 8

Hypothesis of no difference or relationship (e.g., there is no association between the disease and the risk factor in the population)

Question 9

What is the Alternative (H1)?

Answer 9

Hypothesis of some difference or relationship (e.g., there is some association between the disease and the risk factor in the population)