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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade IX - Statistics
Question
1
1.
The observations of an ungrouped data are
x
1
,
x
2
,
x
3
and
x
1
<
x
2
<
x
3
.
If the mean and median of the data are
60
and
40
respectively and
x
3
-
x
1
=
100
,
find
x
1
,
x
2
,
x
3
22
,
40
,
122
40
,
40
,
240
24
,
40
,
124
20
,
40
,
120
Question
2
2.
Construct a frequency table
in exclusive form
for the following
ages (in years) of
16
students, taking class size
4
.
24
18
17
10
23
16
23
24
16
22
15
18
14
15
19
22
Age (in years)
10 - 14
14 - 18
18 - 22
22 - 26
No. of Students
1
6
3
6
Age (in years)
10 - 14
14 - 18
18 - 22
22 - 26
No. of Students
1
6
5
6
Age (in years)
10 - 14
14 - 18
18 - 22
22 - 26
No. of Students
1
10
3
6
Age (in years)
10 - 14
14 - 18
18 - 22
22 - 26
No. of Students
1
3
6
6
Age (in years)
10 - 14
14 - 18
18 - 22
22 - 26
No. of Students
6
6
3
1
Question
3
3.
The class size used in the below table is
Class-Interval
40 - 50
51 - 61
62 - 72
73 - 83
84 - 94
95 - 105
106 - 116
Frequency
26
29
16
13
8
27
19
14
10
11
12
9
Question
4
4.
There are 1008 creatures in a zoo as shown in the bar graph. Identify the table for the given bar diagram.
Type of Creatures
Domestic animals
Reptiles
Birds
Beast animals
Wild animals
No. of Creatures
198
153
306
288
63
Type of Creatures
Domestic animals
Reptiles
Birds
Beast animals
Wild animals
No. of Creatures
63
198
153
288
306
Type of Creatures
Domestic animals
Reptiles
Birds
Beast animals
Wild animals
No. of Creatures
198
288
63
306
153
Type of Creatures
Domestic animals
Reptiles
Birds
Beast animals
Wild animals
No. of Creatures
288
306
63
153
198
Type of Creatures
Domestic animals
Reptiles
Birds
Beast animals
Wild animals
No. of Creatures
198
63
288
306
153
Question
5
5.
The marks obtained by Srikanth in his annual exam are shown below. Find the subject that has maximum score.
English
Physics
Biology
Social Studies
Science
Question
6
6.
Rainfall of 16 days (in mm) are given below. Find the mode rainfall.
15
8
5
11
6
5
15
5
12
11
14
15
14
10
6
5
7
mm
4
mm
6
mm
3
mm
5
mm
Question
7
7.
The number of bars present in the bar chart of the following table is
7
2
6
4
5
Question
8
8.
Heights of 21 students are given below. Find the mode.
Height (in cm)
127
134
136
138
143
153
155
157
162
No. of students
2
2
4
3
3
2
3
1
1
136
cm
137
cm
138
cm
134
cm
135
cm
Question
9
9.
The arithmetic mean of
17
37
18
35
10
is
21.4
24.4
22.4
23.4
25.4
Question
10
10.
The scores obtained by 14 students in a test are given below. Find the mean score.
11
20
4
17
10
6
4
10
13
17
10
15
2
7
18
2
20
10
10
3
7
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