Edexcel GCSE Statistics · 1ST0
Specification 2a.04, 2a.06, 2a.08 · Paper 1, Paper 2
The frequency per unit of class width: .
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GCSE Statistics · key term
The frequency per unit of class width, calculated as .
Used by Edexcel
Specification 2a.04, 2a.06, 2a.08 · Paper 1, Paper 2
The frequency per unit of class width: .
For unequal class widths, label the vertical axis ‘Frequency density’, or give a clear proportional key. Do not label unscaled bar heights ‘Frequency’.
For a histogram, show the class widths and frequency-density calculations. Check your answer using frequency = frequency density × class width.
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Label the vertical axis Frequency density (journeys per minute), use an evenly spaced scale starting at zero, and draw the rectangles with heights 0.6, 1.2, 0.8 and 0.3. Every bar spans its whole class interval. Route B is drawn in the same way using its own densities.
Frequency per unit of class width, calculated using .