SOAN 2120 Lecture Notes - Lecture 10: Type I And Type Ii Errors, Null Hypothesis, Online Chat

• School: University of Guelph
• Department: Sociology and Anthropology
• Course: SOAN 2120
• Professor: David Walters

Document Summary

Review class for midterm two review nov 15th. Midterm two 6, 7, 8 (chapters we will be tested on) thursday november 17th chapters 11 and 12 are to help you prepare for written assignment. Type i error: if h0 is not correct and we accept it, we have made the wrong decision (type ii error) Null is true and you reject it type 1. Important: understand the relationship between alpha levels (cid:523)e. g. , . (cid:882)5 and . (cid:882)(cid:883)(cid:524) and the propensity to make a type i or type ii error. Alpha . 01 - 99 percent confident - one percent chance we are wrong (when we reject the null hypothesis) . 05 - 5 percent chance we are wrong. Easier to reject the null at 95 than 99 you don"t have to be as confident. Also, easier to incorrectly to reject the null easier to make a mistake if you alpha is . 05 than . 01.