Simple regression (Aug 23, 2010)
Review
Basic equations for simple regression
The purpose of regression is to describe the relationship between a response variable y and a
predictor variable X, and to evaluate the strength of the relationship if it exists
September 9, 2010
The assumptions of linear regression
Introduction
Multiple regression is used to estimate relationships between a response (dependent) variable and one or more
explanatory (independent) variables. The multiple regression model with k pre
Case Analysis:
Influential data points and outliers
September 12, 2006
Introduction
The process o f doing regression can be divided into four steps: specification, estimation, evaluation and criticism.
So far, we have concentrated on the first three. Mode
Stat 404 (Fall 2006)
Modified Levene Test for Heterogeneity of Variances
1.
Run your model (whether simple,
multiple, polynomial or other); output
and plot the residuals.
Proc Reg;
model y = X/ p xpx i stb influence;
output out=out1 r=e1 p = yhat1; run;
P