Article

Histograms

Friday, 27 March 2026

maths year-1 mechanics-and-statistics year-1-mechanics-and-statistics chapter-3-representations-of-data
frequency daensity=frequencyclass width\text{frequency daensity} = \frac{\text{frequency}}{\text{class width}}
  • The area of a bar is proportional to the frequency it represents
  • Area of a bar is proportional to frequency
area of bar=k×frequency\text{area of bar} = k \times \text{frequency}
  • If we join the to-p and middle of each bar, we get a frequency polygon