PSYC 305 Lecture Notes - Lecture 16: Bone Density, Mann–Whitney U Test, Null Hypothesis

• School: McGill University
• Department: Psychology
• Course: PSYC 305
• Professor: Heungsun Hwang

Document Summary

Step 1: transform original data to sign (nominal) or rank (ordinal) data. Step 2: apply parametric tests or new statistic (e. g. , h) to the transformed data. Step 3: make the decision whether to reject the null hypothesis under test. Two types of transformation: sign transformation or rank transformation. 72. 5 is the middle point of the ten scores. You compare each score to this median score. If the score is greater than the medium, you assign it (+); otherwise, you assign it (-) You are transforming your scores to (+) or ( ) If the score is equal to the median score, you assign it (-) You take the ten scores and simply rank them from smallest to largest. Rank 1 is the smallest score, and rank 10 is the largest score. You put these ranks back where you had your original scores, like in the above diagram.