See appendix IV to 40 CFR 264 (Cochran's Approximation to the Behrens-Fisher Student's T-Test), incorporated by reference in 35 Ill. Adm. Code 720.111(b).
Ill. Admin. Code tit. 35, pt. 724, subpt. EE, app D
See appendix IV to 40 CFR 264 (Cochran's Approximation to the Behrens-Fisher Student's T-Test), incorporated by reference in 35 Ill. Adm. Code 720.111(b).
Ill. Admin. Code tit. 35, pt. 724, subpt. EE, app D