APMA 3120 Chapter Notes - Chapter 8: Boogie 2Nite, Level Of Measurement, Coefficient Of Determination
19 Apr 2016
School
Department
Course
Professor
Document Summary
Compute correlation coefficients to know how two variables are related to each other. For pearson product-moment correlation, both variables must be measured on an interval or ratio scale (aka continuous variables) Two fundamental characteristics of the relationship between two variables in analysis: direction positive or negative correlation. If sample where low scores on 1 variable associated with low scores on the other and high scores on one variable associated with high scored on 2nd, adding up the products from multiplication will result in positive correlation coefficient. If member of sample has score higher than average on the 1st variable (positive z score) and a score below the mean on the 2nd (negative z score), when the two scores are multiplied-negative correlation coefficient. Standardizing the covariance produces the correlation coefficient: correlation: variation in the scores on one variable correspond with variation in the scores on a.
