PSYC 300B Chapter Notes - Chapter 3: Joint Probability Distribution, Sampling Distribution, Descriptive Statistics

• School: University of Victoria
• Department: Psychology
• Course: PSYC 300B
• Professor: David Medler

Document Summary

Psyc 300b - chapter 3: hypothesis testing of the correlation coef cient: hypothesis testing applying to correlation coef cients. Pearson r: a descriptive measure of the relationship between 2 variables: has both magnitude & direction. Apply hypothesis testing in order to determine whether r represents sampling error or an actual meaningful association between 2 variables. Use the random sampling method, which has the 3 distributions: (i) population distribution: data bivariate distribution of x & y scores, parameter of interest (mean) rho ( ) (not ) Range of is -1. 00 to +1. 00. Assume there is no linear correlation, so = 0: variability product of the variability of x & y ( x y = ?, shape values assumed to be a normally distributed. Make df adjustment when estimating x y from sxsy. Sampling distribution of correlations for df = . H1: r r or h1: r 0.