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Double Bar Graph
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A single or simple bar graph usually represents value to a single set of data. But when we need to represent and compare two sets of data, we need Double Bar Graphs.
Following example further illustrates Double Bar Graphs.
Example – Temperature of two cities X & Y for entire week is represented in the following tabular form.
Draw a double bar graph and answer the following questions:<
1) On which day the temperature of both cities is same ?
2) On which day there is maximum difference in temperature of both cities ?
3) On which day there is least difference in temperature of both cities ?
4) Hottest and coldest days(s) for both cities ?
Answer – Below is the required Double Bar Graphs representing temperature of City X and City Y from Monday to Sunday:
Below are answers to questions:
Question 1 - On which day the temperature of both cities is same ?
Answer - The temperature of city X and Y is same on Wednesday i.e 30 degrees
Question 2 - On which day there is maximum difference in temperature of both cities ?
Answer - Maximum difference in temperature of both the cities is on Thursday i.e. 7 degrees difference
Question 3 - On which day there is least difference in temperature of both cities ?
Answer - Least difference in temperature of both the cities is on Tuesday i.e. 1 degree difference only.
Question 4 - Hottest and coldest days(s) for both cities ?
Hottest Day for City X = Monday i.e. 35 Degrees
Hottest Day for City Y = Wednesday i.e. 30 Degrees
Coldest Day for City X = Sunday i.e. 25 Degrees
Coldest Days for City Y = Thursday & Friday Sunday i.e. 25 Degrees each.