047 - StatQuickie: Which t test to use

pared t-tests are for when you have “before and after” measurements for each subject.

대응 표본 t 검정(paired t-test) - 공돌이의 수학정리노트 (Angelo’s Math Notes)

t-test that do not assume eqaul variation in both groups are more conservative

If you pass this test, your data are super solid.

If possible, use 2-sided t-tests. They are more conservative.