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10 cards from this deck
Histogram bars can have different widths
Frequency density (not frequency)
Frequency divdivdiv Class Width
Frequency Density imes imesimes Class Width
The frequency
How concentrated/packed data is within each class interval
The narrower class has higher frequency density
Different class widths make frequency misleading
Count of data points (how many) in each class
Find overlapping classes, use proportions, apply FD imes imesimes width, sum results
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