Harvtest V1.4 -

The test returns an htest object containing the t-statistic , the p-value , and the degrees of freedom .

It performs a t-test on recursive residuals. If the relationship is non-linear, the mean of these residuals will differ significantly from zero. Hypothesis: Null Hypothesis ( H0cap H sub 0 ): The true relationship is linear. Alternative Hypothesis ( H1cap H sub 1 ): The relationship is non-linear (convex or concave). HARVTEST V1.4

The test is used to determine if the relationship between variables in a linear regression model is truly linear or if it is instead convex or concave. The test returns an htest object containing the

When utilizing this test within a regression diagnostic workflow, the following parameters and outputs are typical: formula : A symbolic description of the model to be tested. Hypothesis: Null Hypothesis ( H0cap H sub 0