Site gives detailed information for constructing a least squares regression line.
Stat Trek.com
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Interactive applet that allows a student to plot points on a graph and see how an outlier affects the regression line of the data points.
Illuminations NCTM
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This site is designed to provide information, demonstrations, links and quizzes associated with the statistics and statistical methods for research design and analysis. It includes tuorials and applets
WebStat
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Very comprehensive list of statistics formulas.
Stat Trek
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It also gives formulas, description, etc for statistics.
Wolfram Mathworld
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The website indexes lectures in Introduction to Statistical Methods course.
Lecture Summaries: Introduction to Statistical Methods
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Site has defintion and explanation of the least squares regression line as well as links to additional resources.
Carlton College Statistics
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Regression topics
Wolfram MathWorld
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