EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Statistics
Grade : CBSE Grade IX
License : Non Commercial Use
Question
1
1.
Heights of 222 plants (in cm) are given below.
Identify the class interval table for the given frequency polygon.
(i)
Height (in cm)
56 - 62
63 - 69
70 - 76
77 - 83
84 - 90
91 - 97
98 - 104
105 - 111
No. of plants
41
32
41
46
10
15
12
25
(ii)
Height (in cm)
56 - 62
63 - 69
70 - 76
77 - 83
84 - 90
91 - 97
98 - 104
105 - 111
No. of plants
41
25
41
46
10
15
12
32
(iii)
Height (in cm)
56 - 62
63 - 69
70 - 76
77 - 83
84 - 90
91 - 97
98 - 104
105 - 111
No. of plants
41
25
41
46
14
15
12
32
(iv)
Height (in cm)
56 - 62
63 - 69
70 - 76
77 - 83
84 - 90
91 - 97
98 - 104
105 - 111
No. of plants
41
25
43
46
10
15
12
32
(v)
Height (in cm)
56 - 62
63 - 69
70 - 76
77 - 83
84 - 90
91 - 97
98 - 104
105 - 111
No. of plants
41
25
46
41
10
15
12
32
Question
2
2.
The following bar graph gives data regarding the favourite sport of 693 students of a school. Identify the table for the given bar diagram.
(i)
Sport
basketball
swimming
shotput
volleyball
kabaddi
running
No. of students
171
126
63
108
45
180
(ii)
Sport
basketball
swimming
shotput
volleyball
kabaddi
running
No. of students
126
180
171
108
45
63
(iii)
Sport
basketball
swimming
shotput
volleyball
kabaddi
running
No. of students
171
108
45
126
63
180
(iv)
Sport
basketball
swimming
shotput
volleyball
kabaddi
running
No. of students
63
45
126
171
180
108
(v)
Sport
basketball
swimming
shotput
volleyball
kabaddi
running
No. of students
126
171
108
45
180
63
Question
3
3.
In exclusive form representation, the observation
50
falls in which class?
(i)
60
-
70
(ii)
55
-
65
(iii)
50
-
60
(iv)
45
-
50
(v)
40
-
50
Question
4
4.
Scores of 11 students are given below. Find the median score.
73
82
90
80
89
89
88
84
74
72
83
(i)
82
(ii)
81
(iii)
85
(iv)
84
(v)
83
Question
5
5.
Identify the class interval table for the given histogram.
(i)
Weight (in kg)
11 - 14
14 - 17
17 - 20
20 - 23
23 - 26
26 - 29
29 - 32
32 - 35
No. of students
6
19
30
19
11
12
11
13
(ii)
Weight (in kg)
11 - 14
14 - 17
17 - 20
20 - 23
23 - 26
26 - 29
29 - 32
32 - 35
No. of students
6
19
19
30
11
12
11
13
(iii)
Weight (in kg)
11 - 14
14 - 17
17 - 20
20 - 23
23 - 26
26 - 29
29 - 32
32 - 35
No. of students
6
13
30
19
11
12
11
19
(iv)
Weight (in kg)
11 - 14
14 - 17
17 - 20
20 - 23
23 - 26
26 - 29
29 - 32
32 - 35
No. of students
6
19
28
19
11
12
11
13
(v)
Weight (in kg)
11 - 14
14 - 17
17 - 20
20 - 23
23 - 26
26 - 29
29 - 32
32 - 35
No. of students
6
19
30
19
6
12
11
13
Question
6
6.
Ages of 161 students (in years) are given below.
Identify the class interval table for the given histogram and frequency polygon on the same graph.
(i)
Age (in years)
18 - 25
26 - 33
34 - 41
42 - 49
50 - 57
58 - 65
66 - 73
74 - 81
No. of students
5
25
1
27
10
36
5
47
(ii)
Age (in years)
18 - 25
26 - 33
34 - 41
42 - 49
50 - 57
58 - 65
66 - 73
74 - 81
No. of students
5
25
6
27
10
36
5
47
(iii)
Age (in years)
18 - 25
26 - 33
34 - 41
42 - 49
50 - 57
58 - 65
66 - 73
74 - 81
No. of students
5
47
6
27
10
36
5
25
(iv)
Age (in years)
18 - 25
26 - 33
34 - 41
42 - 49
50 - 57
58 - 65
66 - 73
74 - 81
No. of students
5
25
6
27
8
36
5
47
(v)
Age (in years)
18 - 25
26 - 33
34 - 41
42 - 49
50 - 57
58 - 65
66 - 73
74 - 81
No. of students
5
25
27
6
10
36
5
47
Question
7
7.
Given the number of doctors working in government hospitals in a city in various age groups. Identify the class interval table for the given histogram and frequency polygon on the same graph.
(i)
Age (in years)
34 - 39
40 - 45
46 - 51
52 - 57
58 - 63
No. of doctors
46
25
49
15
26
(ii)
Age (in years)
34 - 39
40 - 45
46 - 51
52 - 57
58 - 63
No. of doctors
46
44
25
15
26
(iii)
Age (in years)
34 - 39
40 - 45
46 - 51
52 - 57
58 - 63
No. of doctors
46
25
44
15
26
(iv)
Age (in years)
34 - 39
40 - 45
46 - 51
52 - 57
58 - 63
No. of doctors
46
26
44
15
25
(v)
Age (in years)
34 - 39
40 - 45
46 - 51
52 - 57
58 - 63
No. of doctors
46
21
44
15
26
Question
8
8.
Wages of 10 labourers are given below. Find the median.
Wage (in rupees)
329
349
350
401
404
419
479
483
No. of labourers
1
1
1
1
2
1
1
2
(i)
₹
404.00
(ii)
₹
403.00
(iii)
₹
405.00
(iv)
₹
406.00
(v)
₹
402.00
Question
9
9.
Given frequency polygon showing the number of heart patients at various age groups, identify the class interval table.
(i)
Age (in years)
25 - 33
33 - 41
41 - 49
49 - 57
57 - 65
No. of heart patients
28
23
20
10
26
(ii)
Age (in years)
25 - 33
33 - 41
41 - 49
49 - 57
57 - 65
No. of heart patients
28
20
23
10
26
(iii)
Age (in years)
25 - 33
33 - 41
41 - 49
49 - 57
57 - 65
No. of heart patients
28
27
20
10
26
(iv)
Age (in years)
25 - 33
33 - 41
41 - 49
49 - 57
57 - 65
No. of heart patients
28
23
22
10
26
(v)
Age (in years)
25 - 33
33 - 41
41 - 49
49 - 57
57 - 65
No. of heart patients
28
26
20
10
23
Question
10
10.
Heights of 232 students (in cm) are given below.
Identify the class interval table for the given frequency polygon.
(i)
Height (in cm)
127 - 137
138 - 148
149 - 159
160 - 170
171 - 181
182 - 192
193 - 203
No. of students
34
32
46
13
49
21
37
(ii)
Height (in cm)
127 - 137
138 - 148
149 - 159
160 - 170
171 - 181
182 - 192
193 - 203
No. of students
34
32
43
13
49
21
37
(iii)
Height (in cm)
127 - 137
138 - 148
149 - 159
160 - 170
171 - 181
182 - 192
193 - 203
No. of students
34
46
32
13
49
21
37
(iv)
Height (in cm)
127 - 137
138 - 148
149 - 159
160 - 170
171 - 181
182 - 192
193 - 203
No. of students
34
37
46
13
49
21
32
(v)
Height (in cm)
127 - 137
138 - 148
149 - 159
160 - 170
171 - 181
182 - 192
193 - 203
No. of students
34
32
46
17
49
21
37
Question
11
11.
Following bar graph gives the average temperature of a place during a week. Find the day that has maximum temperature.
(i)
Sat.
(ii)
Mon.
(iii)
Thurs.
(iv)
Wed.
(v)
Tues.
Question
12
12.
Given class interval
18
-
20
in exclusive form, its
class mark is
(i)
22
(ii)
18
(iii)
20
(iv)
19
(v)
16
Question
13
13.
Convert the exclusive form of the class interval 9.5 - 12.5 to inclusive form
(i)
10
-
12.5
(ii)
10
-
12
(iii)
9.5
-
12.5
(iv)
9.5
-
12
(v)
10.5
-
11.5
Question
14
14.
The marks obtained by Daniel in his annual exam are shown below. Find the subject that has 69 score.
(i)
Spanish
(ii)
Science
(iii)
Urdu
(iv)
Mathematics
(v)
Hindi
Question
15
15.
Convert the inclusive form of the class interval 16 - 21 to exclusive form
(i)
15.5
-
21.5
(ii)
15
-
22
(iii)
15.5
-
22
(iv)
16
-
21
(v)
15
-
21.5
Question
16
16.
There are certain creatures in a zoo. Find the type of creature that has 212 creatures presense in the zoo.
(i)
Reptiles
(ii)
Wild animals
(iii)
Land animals
(iv)
Water animals
(v)
Beast animals
Question
17
17.
Scores of 240 students are given below.
Identify the class interval table for the given frequency polygon.
(i)
Score
88 - 93
93 - 98
98 - 103
103 - 108
108 - 113
113 - 118
118 - 123
No. of students
45
25
29
24
28
43
46
(ii)
Score
88 - 93
93 - 98
98 - 103
103 - 108
108 - 113
113 - 118
118 - 123
No. of students
45
25
29
28
28
43
46
(iii)
Score
88 - 93
93 - 98
98 - 103
103 - 108
108 - 113
113 - 118
118 - 123
No. of students
45
46
29
24
28
43
25
(iv)
Score
88 - 93
93 - 98
98 - 103
103 - 108
108 - 113
113 - 118
118 - 123
No. of students
45
25
32
24
28
43
46
(v)
Score
88 - 93
93 - 98
98 - 103
103 - 108
108 - 113
113 - 118
118 - 123
No. of students
45
29
25
24
28
43
46
Question
18
18.
Identify the frequency distribution table for the given ages of 10 students in years
19
19
15
21
13
13
16
12
10
15
(i)
Age (in years)
10
11
12
13
14
15
18
21
22
24
No. of Students
1
1
1
1
1
1
1
1
1
1
(ii)
Age (in years)
10
11
14
20
21
25
No. of Students
2
1
1
3
1
2
(iii)
Age (in years)
10
12
13
15
16
19
21
No. of Students
1
1
2
2
1
2
1
(iv)
Age (in years)
10
12
13
15
19
21
No. of Students
1
1
3
2
2
1
(v)
Age (in years)
10
12
13
15
16
19
21
No. of Students
1
2
2
2
1
1
1
Question
19
19.
Given below is the column-graph showing heights of some mountain peaks. Find the mountain that has maximum height.
(i)
Appalachian
(ii)
Nanda Devi
(iii)
Mount Everest
(iv)
Kanchenjunga
(v)
Kilimanjaro
Question
20
20.
Wages of 21 labourers are given below. Find the mode.
Wage (in rupees)
313
318
341
348
436
464
485
No. of labourers
2
2
1
3
4
3
6
(i)
₹
484.00
(ii)
₹
487.00
(iii)
₹
486.00
(iv)
₹
485.00
(v)
₹
483.00
Question
21
21.
Wages of 25 labourers are given below. Find the mean.
Wage (in rupees)
328
356
360
378
400
416
426
443
444
469
487
No. of labourers
1
2
5
3
2
1
3
1
2
1
4
(i)
₹
410.64
(ii)
₹
408.72
(iii)
₹
409.64
(iv)
₹
408.64
(v)
₹
408.68
Question
22
22.
The class size used in the below table is
Class-Interval
36 - 43
43 - 50
50 - 57
57 - 64
64 - 71
71 - 78
Frequency
25
2
2
30
1
10
(i)
7
(ii)
8
(iii)
6
(iv)
5
(v)
10
Question
23
23.
Find the mean of first 6 multiples of 9.
(i)
32
(ii)
65
2
(iii)
61
2
(iv)
125
4
(v)
63
2
Question
24
24.
Given an even number of random samples with the middle two samples as
x +
27
and x +
28
and the median as
37
1
2
,
find the value of x.
(i)
12
(ii)
11
(iii)
10
(iv)
9
(v)
8
Question
25
25.
Identify the class interval table for the given histogram and frequency polygon on the same graph.
(i)
Class-Interval
12 - 17
18 - 23
24 - 29
30 - 35
36 - 41
42 - 47
48 - 53
Frequency
38
22
64
55
41
58
75
(ii)
Class-Interval
12 - 17
18 - 23
24 - 29
30 - 35
36 - 41
42 - 47
48 - 53
Frequency
38
75
67
55
41
58
22
(iii)
Class-Interval
12 - 17
18 - 23
24 - 29
30 - 35
36 - 41
42 - 47
48 - 53
Frequency
38
75
64
53
41
58
22
(iv)
Class-Interval
12 - 17
18 - 23
24 - 29
30 - 35
36 - 41
42 - 47
48 - 53
Frequency
38
64
75
55
41
58
22
(v)
Class-Interval
12 - 17
18 - 23
24 - 29
30 - 35
36 - 41
42 - 47
48 - 53
Frequency
38
75
64
55
41
58
22
Assignment Key
1) (ii)
2) (v)
3) (iii)
4) (v)
5) (i)
6) (ii)
7) (iii)
8) (i)
9) (i)
10) (i)
11) (ii)
12) (iv)
13) (ii)
14) (v)
15) (i)
16) (iv)
17) (i)
18) (iii)
19) (ii)
20) (iv)
21) (iv)
22) (i)
23) (v)
24) (iii)
25) (v)
