adjusted-r-squaredakaike-information-criterionbias-variancecategorical-covariatesconfidence-intervalscross-validationleast-squaresmodel-selectionmulticollinearitymultivariate-regressionoutlier-detectionpartial-f-testprediction-intervalsr-squaredsimple-linear-regressiont-testunderlying-assumptions