PSYC 1010 Chapter Notes - Chapter 13: Test Statistic, Pearson Product-Moment Correlation Coefficient, Junk Food
Document Summary
Co-relation between two variables (ex. junk food vs. body fat) Correlation coefficient- statistic that quantifies a relation between two variables. Linear relation- data forms an overall pattern for which a straight line may be drawn through. Describes a situation in which participants have similar scores in relation to the mean and spread on both variables. Data points move up and down together. Negative correlation- an association between two variables in which participants with high scores on one variable tend to have low scores on the other variable (high on one variable, low on the other variable) Correlation coefficient of -1. 00 indicates a perfect negative correlation (every point on the scatterplot falls in one line) Data points move up and down opposite to eachother. Correlation of 0. 00 falls right in the middle of the two extremes- indicating no correlation (no association between the two variables)
