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Topic Content:
- 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:
(a) Plot a bar chart for this information.
(b) What is the average production for the five-year period? (WAEC)
Solution:
(a)
(b)
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Sum of items produced = 4100 + 2500 + 1500 + 1800 + 9200 = 19100
Number of years = 5
∴ Average Production = \( \frac{19100}{5} \)
Example 7.2.2:
The diagram below is a bar chart showing the distribution of marks scored in a mathematics test. Use the bar chart to answer the following questions.
(a) How many students took the test?
(b) What was the
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Liked by King David and 2 others
that was easy😁