TY  - RPRT
TI  - Statistics notebook: entry IV.B: (3) two-sample pooled variance t-test and (4) two-sample separate variance t-test.
AU  - P N De Land
AU  - W W Chase
PY  - 1993
DO  - 10.1097/00006324-199312000-00014
UR  - https://pubmed.ncbi.nlm.nih.gov/8115133/
ID  - 8115133
ER  -