 of the Mazda’s rotary engine
as a straight six-cylinder engine and the Porsche’s flat engine as a V
engine, as well as the inclusion of the diesel Mercedes 240D, have been
retained to enable direct comparisons to be made with previous analyses.”
</p>
<h4 class="subsubheading" id="Source-41"><span>Source<a class="copiable-link" href="#Source-41"> &para;</a></span></h4>

<p>Henderson and Velleman (1981). Building multiple regression models
interactively. <cite class="cite">Biometrics</cite>, 37, 391–