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10 cards from this deck
How spread out/scattered data values are within a dataset
Highest value - Lowest value
Only uses 2 values; heavily influenced by outliers
Middle 50% of data
UQ - LQ (Upper quartile - Lower quartile)
How much, on average, each value differs from the mean
√[Σ(x - x̄)²/n]
Value before taking square root in SD calculation
Approximately 68%
Low: clustered near mean; High: widely spread from mean
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