KP290 Lecture Notes - Lecture 6: Type I And Type Ii Errors, Null Hypothesis, Vanier Cup

• School: WLU
• Department: Kinesiology & Physical Education
• Course: KP290
• Professor: Kimberley Dawson

Document Summary

Kp290 lecture topic 6: when we read about research studies (whether in a journal, magazine, newspaper, online, etc. Core concept #1: precision and probability: refers to the amount of random error in a study (aka probability, the smaller the amount of error, the better. Your decision ho true (no effect; ha false) If (cid:455)ou reje(cid:272)t the ho, (cid:449)he(cid:374) (cid:455)ou should(cid:859)(cid:448)e a(cid:272)(cid:272)epted it = type i error: rejection of ho when null is in fact true, type i = false positive. I(cid:374) other (cid:449)ords, (cid:455)ou should(cid:859)(cid:448)e kept the ho si(cid:374)(cid:272)e the fi(cid:374)di(cid:374)gs did(cid:374)(cid:859)t sho(cid:449) a (cid:272)ha(cid:374)ge. If (cid:455)ou a(cid:272)(cid:272)ept the ho, (cid:449)he(cid:374) (cid:455)ou should(cid:859)(cid:448)e rejected it = type ii error: acceptance of the ho when the null is in fact false, type ii = false negative. Core concept #2: validity: measurement of systematic error (aka bias, studies with a lot of bias have limited validity, types of validity internal, external, measurement.