Your post should ALWAYS contain an introduction and a conclusion. You wouldn't run a race without stretching first and cooling down afterward, so don't submit a Main Post without an introduction and a conclusion. This includes Main Posts that are answering multiple questions. Your Main Post cannot earn a grade of "A" if you do not have an introduction and a conclusion.

The ideal Main Post will have at least three paragraphs, will be at least 250 words (equivalent to one double-spaced page) and will cite at least one reliable source.

Main Postings:

A. Explain some of the criteria you must use when deciding which modeling tool to use for analyses. Why does it matter? Give specific examples of when each of the three models are best: decision trees, regression analysis, neural networks.