how do we use a regression e to predict a score
variable 1 = intercept + slope x variable 2
what is a residual
predicted errors, sum of all residuals =0
relationship between the v of true scores, predicted and residuals
variance of predicted scores + variance residuals = variance true scores
correlation and regression - moving 1 SD
moves to whereever the slopeline is
correlation of x means
change a by 1 SD b changes by x SD
regression to the mean
the second measurement of a variable is less extreme than the 1st