T-Tests and F-Tests

Mean of Sample of differences

1 group of kids watches two different movies. Measures how aggressive they are after each movie. Is there a difference between both?

Mean of a single sample (difference)

1 group of kids watches 1 movie. Measures how they act after the movie and compares it to a set average.

Differences between two sample means (independent samples)

2 groups of kids watch a different movie. Measure how aggressive they are after movies. Compares difference between each group.

Which test do you perform if there are more than 2 groups?

F-test

Which test do you perform if there are less than 2 groups?

T-test

If there are 2 independent variables, which F-test is it?

Two-way

How do you set up the problem?

Determine the independent and dependent variables and determine if it’s numerical or categorical. Determine how many groups there are.

Null Hypothesis

There is no difference among groups