Grouped Frequency Tables (AQA GCSE Maths): Flashcards

Data sorted into ranges/classes/intervals

Handle large data & spot patterns easily

No gaps; use $<$ and $\leq$ to define boundaries

Single number in middle of class range

$\frac{\text{Lower boundary} + \text{Upper boundary}}{2}$

Class interval with highest frequency

$(n + 1) \div 2$ where $n$ = total data points

$\frac{\sum(f \times \text{mid-int})}{\sum f}$

Difference of highest & lowest class boundaries

Estimates, not exact values