PSYC 2040 Lecture Notes - Lecture 2: Null Hypothesis, Alternative Hypothesis

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2040
• Professor: David Stanley

Document Summary

Paired t test/repeated measures: used when comparing the scores of the same group of individuals (tested at two different times) Assumptions: random sampling from a clearly defined population, population difference values are normally distributed. There is no levene"s test since the same people are being used in both groups. Describes the magnitude of differences using cohen"s d. D = mgroup1 mgroup2 / sdpooled (or sds separate if variances are not equal) Choose the guideline that is closest to the value in your calculation.