NCERT Class 7 Mathematics Solutions: Chapter 3 –Data Handling Exercise 3.3 Part 3
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1. Consider this data collected from a survey of a colony.
Favorite Sport | Cricket | Basketball | Swimming | Hockey | Athletics |
Watching | |||||
Participating |
(i) Draw a double bar graph choosing an appropriate scale. What do you infer from the bar graph?
(ii) Which sport is most popular?
(iii) Which is more preferred, watching or participating in sports?
Answer:
Data represented by the double bar graph is as follows:
(i) This bar graph represents the number of persons who are watching and participating in their favourite sports.
(ii) Cricket is most popular.
(iii) Watching sports is more preferred.
2. Take the data giving the minimum and the maximum temperature of various cities given in the beginning of this Chapter. Plot a double bar graph using the data and answer the following:
City | Ahmedabad | Amritsar | Bangalore | Chennai |
Max. Min. | ||||
City | Delhi | Jaipur | Jammu | Mumbai |
Max. Min. |
(i) Which city has the largest difference in the minimum and maximum temperature on the given data?
(ii) Which is the hottest city and which is the coldest city?
(iii) Name two cities where maximum temperature of one was less than the minimum temperature of the order.
(iv) Name the city, which has the least difference between its minimum and the maximum temperature.
Answer:
Data represented by double bar graph is as follows:
(i) Jammu has the largest difference in temperature i.e.,
Maximum temperature and
Minimum temperature
Difference
(ii) Jammu is the hottest city due to maximum temperature is high and Bangalore is the coldest city due to maximum temperature is low.
(iii) Maximum temperature of Bangalore is
Minimum temperature of two cities whose minimum temperature is higher than the maximum temperature of Bangalore are Ahmedabad and Jaipur where the minimum temperature is
(iv) Mumbai has the least difference in temperature i.e.
Maximum temperature and
Minimum temperature
Difference