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15 cards from this deck
How data is distributed around the centre
Difference between highest and lowest values
Spread of middle 50% of data
Four equal groups of 25% each
25% of the way through ordered data
50% of the way through ordered data
75% of the way through ordered data
In ascending order
(n+1)div4(n + 1) div 4(n+1)div4
3(n+1)div43(n + 1) div 43(n+1)div4
Q3−Q1Q_3 - Q_1Q3−Q1
Middle 50% of data values
Not affected by extreme values/outliers
Quartiles and other measures easily
(n+1)div2(n + 1) div 2(n+1)div2
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