In this video, Salman Khan of Khan Academy explains averages.
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Khan Academy
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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This website provides graphical displays, an index of online calculators and summaries of main topis in statistics.
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Statistics to Use
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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
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WebStat
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Very comprehensive list of statistics formulas.
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Stat Trek
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In this video, Salman Khan of Khan Academy explains random variables in statistics.
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Khan Academy
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Online Textbook for a variety of statistical tests
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Statistica Website
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Goes over collecting and organizing data into frequency tables, histograms, box and whisker plots, and stem-and-leaf plots. Also shows finding mean, median and mode. Many include videos!
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Online Math Learning
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It also gives formulas, description, etc for statistics.
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Wolfram Mathworld
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Flash tutorial with clear explanations about what deviation and variance mean along with how to calculate these by hand, using Excel and using the calculator.
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Usable Stats
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