“Learning Statistics: Concepts and Applications in R” S:1 E:6 Covariance and Correlation

S:1 E:6 Covariance and Correlation When are two variables correlated? Learn how to measure covariance, which is the association between two random variables. Then use covariance to obtain a dimensionless number called the correlation coefficient. Using an R data set, plot correlation values for several variables, including the physical measurements of a sample population.