hypothesis

directional hypothesis

Predicts the way the results will turn out predicts which group will do better

Exercise will increase happiness scores.”

Non directional hypothesis

Says there will be a difference between groups but not which one will do better Exercise will have an effect on happiness scores.”

Null hypothesis

A statement that says there is no effect, no difference, or no relationship between the variables you’re studying. It assumes nothing changes.

Example: “Exercise has no effect on happiness scores.”

Alternative hypothesis

A statement that says there is an effect, difference, or relationship between the variables. It’s what you think might actually be true.

Example: “Exercise does affect happiness scores.”