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Glasser, Leslie – Journal of Chemical Education, 2014
We introduce various methods which are used to depict three-dimensional objects on two-dimensional surfaces. Many of these are artistic and not conducive to exact interpretation. Instead, the scientific and engineering practices and mathematics of orthographic projection are introduced, and illustrated in an accompanying interactive Excel…
Descriptors: Science Education, Illustrations, Computer Graphics, Scientific Concepts
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Glasser, Leslie – Journal of Chemical Education, 2007
Least-squares linear regression is the best of statistics and it is the worst of statistics. The reasons for this paradoxical claim, arising from possible inapplicability of the method and the excessive influence of "outliers", are discussed and substitute regression methods based on median selection, which is both robust and resistant, are…
Descriptors: Regression (Statistics), Least Squares Statistics, Computer Software, Graduate Students