PSY201H1 Lecture Notes - Lecture 8: Effect Size, Type I And Type Ii Errors, Null Hypothesis

• School: UTSG
• Department: Psychology
• Course: PSY201H1
• Professor: Adam Keith Anderson

Document Summary

Hypothesis testing ; assume null hypothesis is true & test: compete h1 vs h0, h0 ( null hypothesis); Derived from original pop: h1 (alternative hypothesis); Depending on your direction result can be differ. If you have prediction with certain direction but don"t find significant effect, you don"t know if it"s significant on the other side. Chocolate reduce stress? original pop mean; 20. 65: h0; m=20. 65, h1; m<20. 65, **never accept h0 or h1. Instead we will reject or fail to reject. Se of m= . 57, z=-2. 51: reject null; z=-2. 51, p