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12 cards from this deck
Histogram
Frequency density
rac{ ext{Frequency}}{ ext{Class Width}}
extFrequencyDensityimesextClassWidth ext{Frequency Density} imes ext{Class Width}extFrequencyDensityimesextClassWidth
Frequency for that class interval
Histograms have different bar widths; bar charts have equal widths
Grouped data with unequal class intervals
No, must consider both height and width
Multiply frequency density by class width
Both frequency and class width
Calculate class width for each interval
Allows fair comparison across different interval widths
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