Box Plots (AQA GCSE Maths): Flashcards

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Box plots
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Five-number summary in box plot

Min, Q₁, median, Q₃, max

% of data below lower quartile (Q1Q_1)

25%

% of data below upper quartile (Q3Q_3)

75%

IQR formula

Q3Q1Q_3 - Q_1

IQR measures

Spread of middle 50% of data

Why IQR more reliable than range

Not affected by outliers

Box contains

Middle 50% of data

Whiskers show

Minimum and maximum values

Box plots excellent for

Quickly comparing multiple data sets

Number of equal parts quartiles create

Four equal parts of 25% each

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