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
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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.