EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Statistics
Grade : CBSE Grade IX
License : Non Commercial Use
Question
1
1.
Rainfall of 11 days are given below. Find the mode.
Rainfall (in mm)
5
7
9
10
11
13
15
No. of days
3
1
1
2
2
1
1
(i)
4
mm
(ii)
6
mm
(iii)
7
mm
(iv)
3
mm
(v)
5
mm
Question
2
2.
The scores obtained by 6 students in a test are given below. Find the mean score.
1
16
4
8
15
18
(i)
1
(ii)
17
(iii)
18
(iv)
10
1
3
(v)
11
1
2
Question
3
3.
Read the column-graph given below. Find the year that has 76 million tonnes food grains production.
(i)
2009
(ii)
2010
(iii)
2007
(iv)
2011
(v)
2008
Question
4
4.
Given an even number of random samples with the middle two samples as
x +
21
and x +
25
and the median as
27
,
find the value of x.
(i)
3
(ii)
5
(iii)
1
(iv)
4
(v)
6
Question
5
5.
Heights of 15 students are given below. Find the mean.
Height (in cm)
141
142
153
162
164
166
167
No. of students
3
1
3
1
1
2
4
(i)
476
3
cm
(ii)
157
cm
(iii)
473
3
cm
(iv)
472
3
cm
(v)
470
3
cm
Question
6
6.
Find the median of first 7 whole numbers.
(i)
2
(ii)
6
(iii)
1
(iv)
4
(v)
3
Question
7
7.
There are certain creatures in a zoo. Find the type of creature that has maximum presense in the zoo.
(i)
Water animals
(ii)
Land animals
(iii)
Reptiles
(iv)
Domestic animals
(v)
Birds
Question
8
8.
Find the median of the first 20 even numbers.
(i)
22
(ii)
20
(iii)
21
(iv)
23
(v)
19
Question
9
9.
Given class interval
20
-
22
in exclusive form, its
class size is
(i)
1
(ii)
2
(iii)
3
(iv)
-1
(v)
5
Question
10
10.
Which of the following are true?
a)
The difference between the true upper limit and true lower limit is called the class mark.
b)
The true lower limit of the exclusive form class interval 40 - 50 is 40.
c)
Each numerical figure in a data set is called an observation.
d)
The number of times a particular observation occurs is called its frequency.
e)
The true lower limit of the inclusive form class interval 40 - 50 is 40.
(i)
{a,e,d}
(ii)
{a,b}
(iii)
{b,c,d}
(iv)
{a,b,c}
(v)
{e,c}
Question
11
11.
Identify the class interval table for the given frequency polygon.
(i)
Class-Interval
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
55 - 60
Frequency
46
20
15
18
19
36
14
34
(ii)
Class-Interval
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
55 - 60
Frequency
46
34
11
18
19
36
14
20
(iii)
Class-Interval
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
55 - 60
Frequency
46
20
11
18
19
36
14
34
(iv)
Class-Interval
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
55 - 60
Frequency
46
20
18
11
19
36
14
34
(v)
Class-Interval
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
55 - 60
Frequency
46
20
11
18
14
36
14
34
Question
12
12.
Temperatures of 114 days (in °C) are given below.
Identify the class interval table for the given histogram.
(i)
Temperature (in degree)
33 - 39
40 - 46
47 - 53
54 - 60
61 - 67
68 - 74
No. of days
19
50
17
6
10
12
(ii)
Temperature (in degree)
33 - 39
40 - 46
47 - 53
54 - 60
61 - 67
68 - 74
No. of days
19
17
12
6
10
50
(iii)
Temperature (in degree)
33 - 39
40 - 46
47 - 53
54 - 60
61 - 67
68 - 74
No. of days
19
12
17
6
10
50
(iv)
Temperature (in degree)
33 - 39
40 - 46
47 - 53
54 - 60
61 - 67
68 - 74
No. of days
19
12
22
6
10
50
(v)
Temperature (in degree)
33 - 39
40 - 46
47 - 53
54 - 60
61 - 67
68 - 74
No. of days
19
12
17
4
10
50
Question
13
13.
Daily wages of 208 labourers (in ₹) are given below.
Identify the class interval table for the given histogram and frequency polygon on the same graph.
(i)
Daily wage(in Rs)
286 - 293
293 - 300
300 - 307
307 - 314
314 - 321
321 - 328
328 - 335
335 - 342
No. of labourers
46
30
12
10
47
27
9
27
(ii)
Daily wage(in Rs)
286 - 293
293 - 300
300 - 307
307 - 314
314 - 321
321 - 328
328 - 335
335 - 342
No. of labourers
46
30
12
10
52
27
9
27
(iii)
Daily wage(in Rs)
286 - 293
293 - 300
300 - 307
307 - 314
314 - 321
321 - 328
328 - 335
335 - 342
No. of labourers
46
30
10
12
47
27
9
27
(iv)
Daily wage(in Rs)
286 - 293
293 - 300
300 - 307
307 - 314
314 - 321
321 - 328
328 - 335
335 - 342
No. of labourers
46
30
7
10
47
27
9
27
(v)
Daily wage(in Rs)
286 - 293
293 - 300
300 - 307
307 - 314
314 - 321
321 - 328
328 - 335
335 - 342
No. of labourers
46
27
12
10
47
27
9
30
Question
14
14.
Temperatures of 12 days (in °C) are given below. Find the mode temperature.
26
32
34
30
32
27
31
34
25
32
27
32
(i)
31
°C
(ii)
32
°C
(iii)
33
°C
(iv)
30
°C
(v)
34
°C
Question
15
15.
The following bar graph shows the export earnings of a country (in thousand crore) during five years. Find the year that has minimum export earnings.
(i)
2007-08
(ii)
2010-11
(iii)
2009-10
(iv)
2008-09
(v)
2006-07
Question
16
16.
The scores obtained by 8 students in a test are given below. Find the range.
9
4
15
6
1
11
6
16
(i)
8
1
2
(ii)
1
(iii)
15
(iv)
6
(v)
16
Question
17
17.
Temperatures of 181 days (in °C) are given below.
Identify the class interval table for the given frequency polygon.
(i)
Temperature (in degree)
28 - 37
37 - 46
46 - 55
55 - 64
64 - 73
No. of days
39
43
35
37
27
(ii)
Temperature (in degree)
28 - 37
37 - 46
46 - 55
55 - 64
64 - 73
No. of days
39
35
45
37
27
(iii)
Temperature (in degree)
28 - 37
37 - 46
46 - 55
55 - 64
64 - 73
No. of days
39
27
43
37
35
(iv)
Temperature (in degree)
28 - 37
37 - 46
46 - 55
55 - 64
64 - 73
No. of days
39
38
43
37
27
(v)
Temperature (in degree)
28 - 37
37 - 46
46 - 55
55 - 64
64 - 73
No. of days
39
35
43
37
27
Question
18
18.
Daily wages of 14 labourers (in ₹) are given below. Find the median wage.
433
334
344
337
390
383
366
331
464
436
367
337
325
337
(i)
₹
357.00
(ii)
₹
354.00
(iii)
₹
356.00
(iv)
₹
355.00
(v)
₹
353.00
Question
19
19.
There are certain creatures in a zoo. Find the type of creature that has 360 creatures presense in the zoo.
(i)
Birds
(ii)
Reptiles
(iii)
Wild animals
(iv)
Land animals
(v)
Beast animals
Question
20
20.
Scores of 247 students are given below.
Identify the class interval table for the given histogram and frequency polygon on the same graph.
(i)
Score
88 - 95
96 - 103
104 - 111
112 - 119
120 - 127
128 - 135
136 - 143
144 - 151
No. of students
37
27
41
39
22
45
11
21
(ii)
Score
88 - 95
96 - 103
104 - 111
112 - 119
120 - 127
128 - 135
136 - 143
144 - 151
No. of students
37
27
39
45
22
45
11
21
(iii)
Score
88 - 95
96 - 103
104 - 111
112 - 119
120 - 127
128 - 135
136 - 143
144 - 151
No. of students
37
27
45
39
22
45
11
21
(iv)
Score
88 - 95
96 - 103
104 - 111
112 - 119
120 - 127
128 - 135
136 - 143
144 - 151
No. of students
37
21
45
39
22
45
11
27
(v)
Score
88 - 95
96 - 103
104 - 111
112 - 119
120 - 127
128 - 135
136 - 143
144 - 151
No. of students
37
27
45
39
24
45
11
21
Question
21
21.
Convert the exclusive form of the class interval 31.5 - 38.5 to inclusive form
(i)
32.5
-
37.5
(ii)
32
-
38
(iii)
31.5
-
38.5
(iv)
31.5
-
38
(v)
32
-
38.5
Question
22
22.
The following bar graph shows the export earnings of a country (in thousand crore) during five years. Find the year that has maximum export earnings.
(i)
2010-11
(ii)
2007-08
(iii)
2006-07
(iv)
2008-09
(v)
2009-10
Question
23
23.
Scores of 16 students are given below. Find the mode.
Score
71
73
75
76
81
82
84
85
87
No. of students
1
2
4
3
1
1
2
1
1
(i)
75
(ii)
76
(iii)
77
(iv)
73
(v)
74
Question
24
24.
Rainfall of 14 days (in mm) are given below. Find the median rainfall.
12
9
13
10
9
14
5
12
5
13
9
13
9
8
(i)
19
2
mm
(ii)
10
mm
(iii)
21
2
mm
(iv)
23
2
mm
Question
25
25.
The marks obtained by 15 students in a test are given below. Find their mode marks.
14
41
27
27
15
50
30
34
27
31
27
22
11
32
5
(i)
24
(ii)
29
(iii)
26
(iv)
27
(v)
28
Assignment Key
1) (v)
2) (iv)
3) (ii)
4) (iv)
5) (v)
6) (v)
7) (i)
8) (iii)
9) (ii)
10) (iii)
11) (iii)
12) (iii)
13) (i)
14) (ii)
15) (v)
16) (iii)
17) (v)
18) (iv)
19) (i)
20) (iii)
21) (ii)
22) (i)
23) (i)
24) (i)
25) (iv)
