Problem

The estimated regression equation where y = number of indictments dispos...

The estimated regression equation

where

y = number of indictments disposed of in a given month

x 1 = number of cases on judge’s docket

x 2 = number of cases pending in the criminal trial court

x 3 = x1x2

appeared in the article “The Caseload Controversy and the Study of Criminal Courts” (Journal of Criminal Law and Criminology [1979]: 89– 101). This equation

was based on n = 367 observations. The bi’s and their associated standard deviations are given in the accompanying table.

Is inclusion of the interaction predictor important? Test H0: β3 = 0 using a .05 level of significance.

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