Ogives (Grade 11 NSC Matric Mathematics): Flashcards

A cumulative histogram

Cumulative frequencies

Each freq added to sum of all previous freqs

Always increases, never decreases

Beginning of first interval at $y=0$

End of each interval at cumulative frequency

Value below which 25% of data falls

Value below which 75% of data falls

Min, $Q_1$, median ($Q_2$), $Q_3$, max

Ogive: cumulative freqs; Polygon: individual freqs