Difference between revisions of "User talk:Kevin Dunn"
Kevin Dunn (talk | contribs) m |
Kevin Dunn (talk | contribs) m |
||
| Line 21: | Line 21: | ||
\sum{x_2^2} &= 3.0 \\ | \sum{x_2^2} &= 3.0 \\ | ||
\sum{x_1x_2} &= 4.0 \\ | \sum{x_1x_2} &= 4.0 \\ | ||
\sum{x_1y} &= 38.0 | \sum{x_1y} &= 38.0 | ||
</rst> | </rst> | ||
Revision as of 13:14, 7 January 2013
You are probably looking for http://learnche.mcmaster.ca
The questions below are from previous McMaster University exams when the course was taught by Dr. John MacGregor and other instructors. We have covered much of the same material - but a few topics were not covered - so don't expect to be able to answer all questions.
<rst> <rst-options: 'toc' = False/> <rst-options: 'reset-figures' = False/>
.. |-| replace:: :math:`-` .. |+| replace:: :math:`+`
Size experiments were performed to assess the effects of the density (:math:`x_1`) and melt index (:math:`x_2`) of polyethylene chips on the quality (:math:`y`) of an extruded part. It is hypothesized that, over the ranges considered, the effects are linear. The data are mean centered and so a model of the form :math:`y = b_1x_1 + b_2x_2 + e` should hold. The sums of squares and cross products of the data are given below.
.. math::
\sum{x_1^2} &= 7.0 \\ \sum{x_2^2} &= 3.0 \\ \sum{x_1x_2} &= 4.0 \\ \sum{x_1y} &= 38.0 </rst>