Statistics
T-Test Explained
Compare two groups statistically.
Determines if two means are significantly different.
Types
- Independent: two groups
- Paired: before vs after
- One-sample: vs known value
P-Value
P<0.05=significant. Low probability by chance.
Frequently Asked Questions
When t-test?
Compare two group means. 3+ groups: ANOVA.
P<0.05?
<5% probability if no real difference.
One vs two-tailed?
Two: any difference. One: specific direction. Use two.