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  • Bar Chart

Definition: These are rectangular bars with varying heights but the same width with equal spaces or gaps separating the bars. The height of each bar represents the frequency of each value. The bars may be drawn vertically or horizontally. A bar chart can be used to display qualitative and discrete quantitative data.

Example 7.2.1:

The number of items produced by a company over a five-year period is given below:

Year19781979198019811982
Number Produced41002500150092001800

(a) Plot a bar chart for this information.

(b) What is the average production for the five-year period? (WAEC)

Solution:

(a)

bar chart

(b)

 

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