STAT 541: Linear Tests And Colinearity

Statistics 541: Linear Tests And Colinearity


Linear Tests

Consider productivity (Y) as a function of the amount of labor hours in packing material (X1) and in shipping material (X2). Which generates more output per hour, X1 or X2? EXAMPLE: ETS reciently alleged that there was cheating on SAT exams at some centers. Suppose we have a Y = test result when arriving on campus, X = test result taken non-cheating centers. Z = test results taken at cheating centers, I = which center. How would you test their claim?

Answer: Y = (X+Z) is small model. Y = X + Z + I is full model. Now use partial F.


Last modified: Tue Feb 13 08:53:07 2001