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Histograms

Histograms . Part A – Plotting Part B - Reading. Part A- Plotting. Random set of data. Important Formula. Height = Frequency / Width H = F / W W * H = F F = W * H Area = W * H Therefore, Area = Frequency Note : Width refers to the range.

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Histograms

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  1. Histograms Part A – Plotting Part B - Reading

  2. Part A- Plotting • Random set of data

  3. Important Formula • Height = Frequency / Width • H = F / W • W * H = F • F = W * H • Area = W * H • Therefore, • Area = Frequency • Note : Width refers to the range

  4. Now, we add in the height and width into the set of data.

  5. Time to plot the graph!

  6. How to read? • Since W * H = F = Area • You take the width of the bar and multiply it by the width to get the frequency. • Eg. From the histogram, find the frequency of people aged 70 ≤ y<120 in Lalatown. • 120 – 70 = 50 (width) • Height = 10 (Frequency Density) • 50 * 10 = 500 • Therefore, the frequency of people aged 70 ≤ y<120 in Lalatownis 500.

  7. Thank You

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