This unit introduces some beginning topics from Statistics.

This video explains the three main measures of central tendency.
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This video explains the main measures of variation in a set.
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Histograms

by Sal Khan
This video explains the use of histograms in visualizing statistical data.
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This video explains the use of Box-and-Whisker diagrams to illustrate the variation in a dataset.
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Proportionality

by Sal Khan
This video explores the notion of proportionality in real problems.
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