Mark 0 20 20 30 30 35 35 45 45 55 55 70 Frequency 9 12 20 29 27 23 Example The distribution below represents the examination marks of 120 students Draw a histogram to represent the data ID: 630061 Download Presentation

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Mark. 0 –20. 20 –30. 30 –35. 35 –45. 45 –55. 55 –70. Frequency. 9. 12. 20. 29. 27. 23. Example. . The distribution below represents the examination marks of 120 students.. Draw a histogram to represent the data.

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Slide1

Histograms

Using a histogram to estimate the medianSlide2

Mark

0 –20

20 –3030 –3535 –4545 –5555 –70Frequency91220292723

Example The distribution below represents the examination marks of 120 students.

Draw a histogram to represent the data

Use the histogram to estimate the median

.Slide3

Height (cm)

Frequency

130 – 135 5135 – 140 7140 – 150 15150 – 160 29160 – 165 13165 – 170 10

170 – 175 1

Example

The following table gives the heights of 80 children.

Draw a histogram to represent this information.

Using the histogram estimate the height by which 20% of the children exceed.

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