Quartiles and Interquartile Range (HSC SSCE Mathematics Advanced): Flashcards

Four approximately equal parts

Value separating lowest 25% of data from the rest

Value separating highest 25% of data from the rest

Arrange data in increasing (ascending) order

$Q_3 - Q_1$

Spread of the middle 50% of the data

Minimum, $Q_1$, Median, $Q_3$, Maximum

More than $1.5 imes ext{IQR}$ from $Q_1$ or $Q_3$

Not heavily influenced by outliers

Visual representation of five-number summary