PSYC 2021 Study Guide - Final Guide: Scatter Plot, Pearson Product-Moment Correlation Coefficient, Partial Correlation

• School: York University
• Department: Psychology
• Course: PSYC 2021
• Professor: Edward Haltrecht

Document Summary

Chapter 15: correlation: a positive correlation indicates that x and y change in the same direction: as x increases, y also increases. A negative correlation indicates that x and y tend to change in opposite directions: as x increases, y decreases: the numerical value of the pearson correlation indicates how well the data points fit a straight line. A value of 1. 00 (or 1. 00) indicates a perfect linear fit and a value of zero indicates no linear trend: sp = 15, sp = 2, a. The scatter plot shows points widely scattered around a line sloping up to the right. b. The correlation is small but positive; around 0. 4 to 0. 6. c. for these scores, ssx = 32, ssy = 8, and sp = 8. The correlation is r = 8/16 = 0. 50: a. The scatter plot shows points widely scattered around a line sloping up to the: a