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10 cards from this deck
Ranges of equal width organizing individual values
Midpoint of an interval
Running total of frequencies
Join with no gaps between them
Line graph drawn alongside or instead of histogram
Cumulative frequency polygon (pronounced 'oh-jive')
At zero (bottom left corner)
xˉ=∑xfn\bar{x} = \frac{\sum xf}{n}xˉ=n∑xf
s2=∑x2fn−xˉ2s^2 = \frac{\sum x^2f}{n} - \bar{x}^2s2=n∑x2f−xˉ2
s=s2s = \sqrt{s^2}s=s2
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