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Statistics

Short Answer Type

41.

For the following data, draw a histogram.

Age (in years)	Number of persons
0–6	8
6–12	12
12–18	15
18–24	18
24–30	12
30–36	4

210 Views

42.

Draw a histogram representing the following frequency distribution:

Marks	No. of students
0–10	3
10–20	5
20–30	8
30–40	10
40–50	7
50–60	2

141 Views

43.

Construct a histogram and frequency polygon for the following data:

Monthly school fee र	No. of schools
600–800	5
800–1000	12
1000–1200	14
1200–1400	18
1400–1600	10
1600–1800	9

164 Views

44.

The following table gives the distribution of 60 students according to marks obtained by them

Marks	Frequency
0–10	3
10–20	9
20–30	18
30–40	16
40–50	12
50–60	2

Draw the frequency polygon for the above data.

120 Views

45.

The following table gives the life times of 400 neon lamps:

Life time (in hours)	Number of lamps
300–400	14
400–500	56
500–600	60
600–700	86
700–800	74
800–900	62
900–1000	48

Represent the above information with the help of a frequency polygon.

107 Views

46.

The following data gives the number (in thousands) of applicants registered with an Employment Exchange during 2005–2010.

Year	No. of applicants registered (in thousand)
2005	19
2006	21
2007	23
2008	30
2009	32
2010	36

Construct a bar graph to represent the above data.

156 Views

47. In a particular section of Class IX, 40 students were asked about the months of their birth, the following graph was prepared for the data so obtained.

Observe the bar graph given above and answer the following questions:

(i) How many students were born in the month of November?
(ii) In which month were the maximum number of students born?

100 Views

48.

A family with monthly income of Rs. 20,000 had planned the following expenditures per month under various heads:

Heads	Expenditure (in Rs. 1000)
Grocery	4
Rent	5
Education of children	5
Medicine	2
Fuel	2
Entertainment	1
Miscellaneous	1

Draw a bar graph for the data above.

110 Views

49.

Consider the marks, out of 100, obtained by 51 students of a class in a test:

Marks	Number of students
0–10	5
10–20	10
20–30	4
30–40	6
40–50	7
50,60	3
60–70	2
70–80	2
80–90	3
90–100	9
Total	51

Draw a frequency polygon corresponding to this frequency distribution table.

133 Views

50.
In a city, the following weekly observations were made in a study on the cost of living index:

Cost of living index

Number of weeks

140–150

5

150–160

10

160–170

20

170–180

9

180–190

6

190–200

2

Total

52

Draw a frequency polygon for the data above (without constructing a histogram).

Classes	Class marks	Frequency
140–150	145	5
150–160	155	10
160–170	165	20
170–180	175	9
180–190	185	6
190–200	195	2
Total		52

Classes

Class marks

Frequency

140–150

145

5

150–160

312 Views

Cost of living index	Number of weeks
140–150	5
150–160	10
160–170	20
170–180	9
180–190	6
190–200	2
Total	52

Previous Year Papers

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Short Answer Type

50. In a city, the following weekly observations were made in a study on the cost of living index: Cost of living index Number of weeks 140–150 5 150–160 10 160–170 20 170–180 9 180–190 6 190–200 2 Total 52 Draw a frequency polygon for the data above (without constructing a histogram).