

   DDuurrbbiinn--WWaattssoonn--TTeesstt

        raintest(formula, data=list())

   AArrgguummeennttss::

    formula: a symbolic describtion for the model to be tested

       data: an optional data frame containing the variables in
             the model.  By default the variables are taken
             from the environment which 'dwtest' is called from

   DDeessccrriippttiioonn::

        `dwtest' performs the Durbin-Watson-Test on autocorre-
        lation of disturbances.

   VVaalluuee::

        A list with class `"htest"' containing the following
        components:

   statistic: the value of the test statistic.

    p.value: the p-value of the test

     method: a character string indicating what type of test
             was performed.

   data.name: a character string giving the name(s) of the
             data.

   AAuutthhoorr((ss))::

        Torsten Hothorn <hothorn@amadeus.statistik.uni-dort-
        mund.de>

   RReeffeerreenncceess::

        Kraemer, W., Sonnberger, H. (1986): The linear regres-
        sion model under test

   SSeeee AAllssoo::

        `lm'

   EExxaammpplleess::

        x <- c(1:30);
        ut <- c(1:30);
        # creating a ARMA(1) process
        for(i in (2:30))
        {
             ut[i] <- 1 * ut[i-1] + rnorm(1,0,2);
        }
        y <- x + ut;
        dw <- dwtest(y ~ x);

