Question: Find the range of the data shown on the bar graph representing the rainfall from October to December.
A ) 5 B ) 20 C ) 14 D ) 4
Steps to derive
1 From the bar graph, the monthly records of rainfall (in cm) are shown on the vertical axis and the months are shown on the horizontal axis.
2 The height of each bar in the graph represents the rainfall during the particular month.
3 Range of the data is the difference between the maximum and the minimum values.
4 From the graph, the rainfall during November was 14 cm, which was the maximum and the rainfall during December was 10 cm, which was the minimum. [The height of the bar in November was the highest and the height of bar in December was the least.]
5 So, range of the data = maximum - minimum = 14 - 10 = 4
