This set of Mathematics Multiple Choice Questions & Answers (MCQs) focuses on “Geographical Representation of Data”.
Explanation: In bar graphs, bar of uniform width are drawn on X-axis with equal space between them while values of variables are shown on Y-axis.
Height of the bars depend on the values of variables.
We can in figure 1 that it matches with the characteristics of bar graphs. Hence, it is the example of bar graphs.
Explanation: Histograms are similar to bar graphs but they are used for continuous class intervals.
In this types of graphs, width of the bar is equal to class interval and height of the bar is equal to frequency of the particular class intervals.
Explanation: Frequency polygons can be drawn by joining mid points of upper sides of rectangles of histograms.
It is shown in the figure given below.
4. From the table give below, how many students weigh equal to or more than 55kg?
Explanation: From the table, we can see that there are three class intervals which contains weight more than 55 kg, 55-60, 60-65 and 65-70 and frequency of them are 2, 3 and 1 respectively.
Therefore, total number of students who weigh more than 55 kg are 2 + 3 + 1 = 6.
Sanfoundry Global Education & Learning Series – Mathematics – Class 9.
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