Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 15: Correlation - a statistical technique used to measure and…
Chapter 15: Correlation - a statistical technique used to measure and describe the relationship between two variables; the relationship obtained in a correlational study is typically described and evaluated with a statistical measure known as correlation
-
-
Strength or consistency of the relationship - it is measured by the numerical value of the correlation
perfect correlation - always identified by a correlation of 1.00 an indicates a perfectly consistent relationship; a correlation of 0, data points are scattered and there is no clear trend between 0 and 1.
Pearson Correlation measures the degree and the direction of the linear relationship between two variables. It measures the relationship between an individual's location in the X distribution and location of Y distribution
Sum of products of deviations (SP) is similar to SS. SP is used to measure the amount of co-variability between 2 variables. The value can either be a definitional formula or a computational formula
Prediction, validity, reliability, and theory verification are why correlation is used
-
Hypothesis tests with the Pearson Correlation- When there is a nonzero correlation there is no correlation in the population (H0) or the nonzero correlation accurately represents a real, nonzero correlation in the population (H1)
-