“Y-hat,” the fitted value of the dependent variable

^0 “Beta zero hat,” the estimated constant term in a regression equation

0 “Beta zero,” the true constant term in a regression equation

^1 “Beta one hat,” an estimated regression coefficient

1 “Beta one,” a true regression coefficient

^2 “Beta two hat,” an estimated regression coefficient

2 “Beta two,” a true regression coefficient

^3 “Beta three hat,” an estimated regression coefficient

3 “Beta three,” a true regression coefficient

^4 “Beta four hat,” an estimated regression coefficient

4 “Beta four,” a true regression coefficient

R2 “R squared,” the coefficient of determinationR2_ “R bar squared,” the R-squared adjusted for degrees of freedomY_ “Y bar,” the mean of the dependent variableX_ “X bar,” the mean of an independent variable X

“Epsilon,” the error term

“Rho,” the correlation coefficient