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10 questions from this quiz
How spread out the values are
R=largest−smallestR = \text{largest} - \text{smallest}R=largest−smallest
Heavily influenced by outliers
Spread of middle 50% of data
75%
IQR=Q3−Q1\text{IQR} = Q_3 - Q_1IQR=Q3−Q1
The mean
Deviations sum to zero otherwise
Data contains outliers
Distribution is roughly symmetric
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