Histograms and Frequency Density (AQA GCSE Maths): Flashcards

Histogram bars can have different widths

Frequency density (not frequency)

Frequency $div$ Class Width

Frequency Density $imes$ Class Width

The frequency

How concentrated/packed data is within each class interval

The narrower class has higher frequency density

Different class widths make frequency misleading

Count of data points (how many) in each class

Find overlapping classes, use proportions, apply FD $imes$ width, sum results