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Data Handling

Question

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The enrolment in a school during six consecutive years was as follow:
1555, 1670, 1750, 2013, 2540, 2820
Find the mean enrolment of the school for this period.

Solution

Mean enrolment

= $\frac{(1555 + 1670 + 1750 + 2013 + 2540 + 2820)}{6} = \frac{12348}{6} = 2058$

Some More Questions From Data Handling Chapter

The weights (in kg.) of 15 students of a class are:
38, 42, 35, 37, 45, 50, 32, 43, 43, 40, 36, 38, 43, 38, 47
(i) Find the mode and median of this data.
(ii) Is there more than one mode?

Find the mode and median of the data: 13, 16, 12, 14, 19, 12, 14, 13, 14

Use the bar graph (see the given figure) to answer the following questions.
(a) Which is the most popular pet?
(b) How many children have dog as a pet?

The performance of students in 1^st Term and 2^nd Term is given. Draw a double bar graph choosing appropriate scale and answer the following:

Subject

English

Hindi

Moths

Science

S. science

1^st Term (M.M. 100)

67

72

88

81

73

2^nd Term (M.M. 100)

70

65

95

85

75

(i) In which subject, has the child improved his performance the most?
(ii) In which subject is the improvement the least?
(iii) Has the performance gone down in any subject?

Consider this data collected from a survey of a colony.

Favourite sport

Cricket

Basket Ball

Swimming

Hockey

Athletics

Watching

1240

470

510

430

250

Participating

620

320

320

250

105

(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?

Take the data giving the minimum and the maximum temperature of various cities given in the following table:

Temperatures of the cities as on 20.6.2006

City

Max.

Min.

Ahmedabad

38 ºC

29 ºC

Amritsar

37 ºC

26 ºC

Banglore

28 ºC

21 ºC

Chennai

36 ºC

27 ºC

Delhi

38 ºC

28 ºC

Jaipur

39 ºC

29 ºC

Jammu

41 ºC

26 ºC

Mumbai

32 ºC

27 ºC

Plot a double bar graph using the data and answer the following:
(i) Which city has the largest difference in the minimum and maximum temperature on the given date?
(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 other.
(iv) Name the city which has the least difference between its minimum and the maximum temperature.

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