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Class VI
Class VII
Class VIII
Class IX
Class X
SSC Grade IX - Statistics
Question
1
1.
The class mark of the class with frequency x is
Class-Interval
Frequency
12 - 22
11
23 - 33
x
34 - 44
24
45 - 55
10
56 - 66
27
28
26
31
29
27
Question
2
2.
If the upper and lower limit of class interval are 47 and 40 respectively, then the class interval is
39.5
-
47
40
-
47.5
40.5
-
46.5
39.5
-
47.5
40
-
47
Question
3
3.
Temperatures of 124 days (in °C) are given below.
Identify the class interval table for the given histogram.
Temperature (in degree)
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
No. of days
17
18
24
36
29
Temperature (in degree)
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
No. of days
17
18
29
36
29
Temperature (in degree)
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
No. of days
17
22
24
36
29
Temperature (in degree)
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
No. of days
17
24
18
36
29
Temperature (in degree)
30 - 35
35 - 40
40 - 45
45 - 50
50 - 55
No. of days
17
29
24
36
18
Question
4
4.
Following are the ages (in years) of patients getting medical treatment in a hospital. Identify the cumulative frequency of the given grouped data.
Age (in years)
10 - 15
15 - 20
20 - 25
25 - 30
30 - 35
35 - 40
40 - 45
No. of Patients
42
23
81
34
42
76
56
Age (in years)
Cumulative Frequency
10 - 15
42
15 - 20
65
20 - 25
142
25 - 30
176
30 - 35
218
35 - 40
294
40 - 45
350
Age (in years)
Cumulative Frequency
10 - 15
42
15 - 20
98
20 - 25
179
25 - 30
213
30 - 35
255
35 - 40
331
40 - 45
354
Age (in years)
Cumulative Frequency
10 - 15
42
15 - 20
123
20 - 25
146
25 - 30
180
30 - 35
222
35 - 40
298
40 - 45
354
Age (in years)
Cumulative Frequency
10 - 15
42
15 - 20
65
20 - 25
146
25 - 30
177
30 - 35
219
35 - 40
295
40 - 45
351
Age (in years)
Cumulative Frequency
10 - 15
42
15 - 20
65
20 - 25
146
25 - 30
180
30 - 35
222
35 - 40
298
40 - 45
354
Question
5
5.
The marks obtained by
19
students in an examination are given below.
Represent the data in the form of a frequency distribution table
in exclusive form
taking class size
8
.
50
40
73
64
40
79
74
72
57
73
73
41
51
71
65
67
77
54
76
Marks
40 - 48
48 - 56
56 - 64
64 - 72
72 - 80
No. of Students
3
1
3
4
8
Marks
40 - 48
48 - 56
56 - 64
64 - 72
72 - 80
No. of Students
3
8
1
4
3
Marks
40 - 48
48 - 56
56 - 64
64 - 72
72 - 80
No. of Students
3
3
1
4
8
Marks
40 - 48
48 - 56
56 - 64
64 - 72
72 - 80
No. of Students
3
5
1
4
8
Marks
40 - 48
48 - 56
56 - 64
64 - 72
72 - 80
No. of Students
3
3
6
4
8
Question
6
6.
The upper limit of the class with frequency x is
Class-Interval
Frequency
40 - 48
3
48 - 56
1
56 - 64
2
64 - 72
x
72 - 80
8
75
69
72
73
71
Question
7
7.
Which of the following are discrete variables?
a)
Heights of children in a class
b)
Temperature at a place over a month
c)
Wages of workers in a factory
d)
Number of players in a team
e)
Number of members in a family
{b,e}
{d,e}
{c,a,d}
{a,d}
{b,e,d}
Question
8
8.
Heights of 15 plants (in cm) are given below. Find the mean height.
92
98
65
97
90
53
76
74
52
74
90
87
53
56
70
1157
15
cm
1127
15
cm
376
5
cm
1142
15
cm
1129
15
cm
Question
9
9.
Ages of 12 students (in years) are given below. Find the mean age.
10
12
13
15
10
12
11
11
14
11
13
12
10
years
11
years
13
years
12
years
14
years
Question
10
10.
Given the sample data, prepare the class interval table in
inclusive
form with
6
as min value and a class size of
9
.
26
23
44
13
10
14
14
39
15
6
41
50
14
45
19
43
28
Class-Interval
6 - 15
15 - 24
24 - 33
33 - 42
42 - 51
Frequency
6
3
2
2
4
Class-Interval
6 - 14
15 - 23
24 - 32
33 - 41
42 - 50
Frequency
6
2
3
2
4
Class-Interval
6 - 14
15 - 23
24 - 32
33 - 41
42 - 50
Frequency
6
7
2
2
4
Class-Interval
6 - 14
15 - 23
24 - 32
33 - 41
42 - 50
Frequency
6
4
2
2
3
Class-Interval
6 - 14
15 - 23
24 - 32
33 - 41
42 - 50
Frequency
6
3
2
2
4
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