EduSahara™ Assignment
Name : Class Interval Table Concepts
Chapter : Statistics
Grade : SSC Grade IX
License : Non Commercial Use
Question
1
1.
If some random sample data is arranged in a frequency distribution table in
inclusive form
with
4
-
8
as the first class,
then the observation
24
falls in which class?
(i)
23
-
27
(ii)
25
-
29
(iii)
24
-
28
(iv)
23.5
-
28.5
(v)
24.5
-
27.5
Question
2
2.
If some random sample data is arranged in a frequency distribution table in
exclusive form
with
2
-
7
as the first class,
then the observation
34
falls in which class?
(i)
31.5
-
37.5
(ii)
33
-
38
(iii)
32
-
37
(iv)
32.5
-
36.5
(v)
31
-
36
Question
3
3.
Given class interval
16
-
25
in exclusive form, its
lower limit is
(i)
17
(ii)
18
(iii)
15
(iv)
16
(v)
14
Question
4
4.
Given class interval
15
-
17
in exclusive form, its
upper limit is
(i)
18
(ii)
14
(iii)
19
(iv)
17
(v)
16
Question
5
5.
Given class interval
45
-
52
in exclusive form, its
class size is
(i)
8
(ii)
7
(iii)
4
(iv)
6
(v)
9
Question
6
6.
Given class interval
44
-
50
in exclusive form, its
class mark is
(i)
44
(ii)
48
(iii)
46
(iv)
49
(v)
47
Question
7
7.
Given class interval
16
-
26
in exclusive form, its
mid value is
(i)
21
(ii)
20
(iii)
22
(iv)
18
(v)
23
Question
8
8.
If the upper and lower limit of class interval are 33 and 29 respectively, then the class interval is
(i)
28.5
-
33.5
(ii)
29
-
33.5
(iii)
29.5
-
32.5
(iv)
28.5
-
33
(v)
29
-
33
Question
9
9.
If the lower and upper limit of class interval are 40 and 50 respectively, then the class interval is
(i)
40
-
50
(ii)
39.5
-
50.5
(iii)
39.5
-
50
(iv)
40
-
50.5
(v)
40.5
-
49.5
Question
10
10.
The class boundaries of 48 - 58 which is in exclusive form are
(i)
48.5
-
57.5
(ii)
48
-
58.5
(iii)
47.5
-
58
(iv)
48
-
58
(v)
47.5
-
58.5
Question
11
11.
The class boundaries of 44 - 48 which is in inclusive form are
(i)
43
-
49
(ii)
43.5
-
49
(iii)
43.5
-
48.5
(iv)
43
-
48.5
(v)
44
-
48
Question
12
12.
Convert the exclusive form of the class interval 23.5 - 29.5 to inclusive form
(i)
24.5
-
28.5
(ii)
23.5
-
29
(iii)
23.5
-
29.5
(iv)
24
-
29
(v)
24
-
29.5
Question
13
13.
Convert the inclusive form of the class interval 30 - 38 to exclusive form
(i)
29.5
-
38.5
(ii)
30
-
38
(iii)
29
-
38.5
(iv)
29
-
39
(v)
29.5
-
39
Question
14
14.
Convert the discontinuous form of the class interval 13 - 20 to continuous form
(i)
12
-
20.5
(ii)
12.5
-
20.5
(iii)
12.5
-
21
(iv)
13
-
20
(v)
12
-
21
Question
15
15.
Convert the continuous form of the class interval 26.5 - 29.5 to discontinuous form
(i)
27.5
-
28.5
(ii)
27
-
29
(iii)
26.5
-
29
(iv)
26.5
-
29.5
(v)
27
-
29.5
Question
16
16.
The class size used in the below table is
Class-Interval
17 - 23
24 - 30
31 - 37
38 - 44
45 - 51
52 - 58
59 - 65
Frequency
15
4
4
27
14
20
10
(i)
8
(ii)
6
(iii)
10
(iv)
7
(v)
5
Question
17
17.
The class size used in the below table is
Class-Interval
26 - 34
34 - 42
42 - 50
50 - 58
58 - 66
66 - 74
Frequency
17
14
11
6
20
14
(i)
11
(ii)
6
(iii)
8
(iv)
9
(v)
7
Question
18
18.
Which of the following are true?
a)
Each numerical figure in a data set is called an observation.
b)
The number of times a particular observation occurs is called its frequency.
c)
The difference between the true upper limit and true lower limit is called the class mark.
d)
The true lower limit of the exclusive form class interval 30 - 40 is 30.
e)
The true lower limit of the inclusive form class interval 30 - 40 is 30.
(i)
{c,a,b}
(ii)
{a,b,d}
(iii)
{c,a}
(iv)
{c,e,d}
(v)
{e,b}
Question
19
19.
Which of the following class intervals are in inclusive form?
a)
21 - 27 , 28 - 34 , 35 - 41,...
b)
21 - 27 , 27 - 33 , 33 - 39,...
c)
42 - 48 , 49 - 55 , 56 - 62,...
d)
39 - 45 , 45 - 51 , 51 - 57...
e)
20.5 - 27.5 , 27.5 - 34.5 , 34.5 - 41.5...
(i)
{a,c}
(ii)
{e,b,a}
(iii)
{d,c,a}
(iv)
{d,c}
(v)
{b,a}
Question
20
20.
In inclusive form representation, the observation
28
falls in which class?
(i)
18
-
28
(ii)
29
-
38
(iii)
17
-
27
(iv)
8
-
18
(v)
13
-
23
Question
21
21.
In exclusive form representation, the observation
18
falls in which class?
(i)
23
-
33
(ii)
8
-
18
(iii)
28
-
38
(iv)
18
-
28
(v)
13
-
18
Question
22
22.
The class mark of the class with frequency x is
Class-Interval
Frequency
11 - 21
13
22 - 32
5
33 - 43
7
44 - 54
x
55 - 65
22
(i)
51
(ii)
49
(iii)
48
(iv)
50
(v)
46
Question
23
23.
The class mark of the class with frequency x is
Class-Interval
Frequency
11 - 21
21
21 - 31
21
31 - 41
22
41 - 51
28
51 - 61
x
(i)
54
(ii)
58
(iii)
57
(iv)
56
(v)
55
Question
24
24.
The mid value of the class with frequency x is
Class-Interval
Frequency
3 - 8
19
9 - 14
x
15 - 20
20
21 - 26
16
27 - 32
16
(i)
23
2
(ii)
25
2
(iii)
45
4
(iv)
12
(v)
21
2
Question
25
25.
The mid value of the class with frequency x is
Class-Interval
Frequency
20 - 25
17
25 - 30
22
30 - 35
x
35 - 40
10
40 - 45
3
(i)
65
2
(ii)
33
(iii)
67
2
(iv)
63
2
(v)
129
4
Question
26
26.
The class boundaries of the class with frequency x is
Class-Interval
Frequency
44 - 51
27
52 - 59
17
60 - 67
x
68 - 75
21
76 - 83
13
(i)
59.5
-
68
(ii)
59.5
-
67.5
(iii)
59
-
68
(iv)
59
-
67.5
(v)
60
-
67
Question
27
27.
The class boundaries of the class with frequency x is
Class-Interval
Frequency
13 - 19
10
19 - 25
13
25 - 31
x
31 - 37
12
37 - 43
4
(i)
25
-
31.5
(ii)
24.5
-
31.5
(iii)
25
-
31
(iv)
24.5
-
31
(v)
25.5
-
30.5
Question
28
28.
The true lower limit and true upper limit of the class with frequency x is
Class-Interval
Frequency
46 - 53
30
54 - 61
x
62 - 69
18
70 - 77
16
78 - 85
8
(i)
53.5
-
62
(ii)
54
-
61
(iii)
53.5
-
61.5
(iv)
53
-
62
(v)
53
-
61.5
Question
29
29.
The true lower limit and true upper limit of the class with frequency x is
Class-Interval
Frequency
32 - 37
10
37 - 42
23
42 - 47
20
47 - 52
21
52 - 57
x
(i)
52
-
57
(ii)
52
-
57.5
(iii)
51.5
-
57
(iv)
52.5
-
56.5
(v)
51.5
-
57.5
Question
30
30.
The lower limit of the class with frequency x is
Class-Interval
Frequency
34 - 40
11
41 - 47
12
48 - 54
2
55 - 61
x
62 - 68
6
(i)
54
(ii)
57
(iii)
56
(iv)
55
(v)
52
Question
31
31.
The upper limit of the class with frequency x is
Class-Interval
Frequency
18 - 28
4
28 - 38
12
38 - 48
2
48 - 58
x
58 - 68
21
(i)
58
(ii)
56
(iii)
59
(iv)
57
(v)
61
Question
32
32.
If the sample data with range 40 has to be divided into 6 class intervals, then the length of the class is
(i)
6
(ii)
7
(iii)
5
(iv)
8
(v)
10
Question
33
33.
If the length of the class is 10, then the number of class intervals needed to represent data with range 70 is
(i)
6
(ii)
5
(iii)
9
(iv)
8
(v)
7
Question
34
34.
The number of classes of class size
7
required to represent
the given random sample in exclusive form
2
2
3
4
5
5
5
7
7
10
13
17
21
22
23
24
27
29
30
31
33
36
40
41
43
44
44
46
47
47
47
48
48
(i)
10
(ii)
7
(iii)
5
(iv)
8
(v)
6
Question
35
35.
Which of the following are continuous variables?
a)
Wages of workers in a factory.
b)
Heights of children in a class.
c)
Number of members in a family.
d)
Weights of persons in a group.
e)
Number of workers in a factory.
(i)
{c,a,b}
(ii)
{c,a}
(iii)
{c,e,d}
(iv)
{a,b,d}
(v)
{e,b}
Question
36
36.
Which of the following are discontinuous variables?
a)
Heights of children in a class.
b)
Wages of workers in a factory.
c)
Number of members in a family.
d)
Number of workers in a factory.
e)
Weights of persons in a group.
(i)
{a,c}
(ii)
{b,d}
(iii)
{c,d}
(iv)
{e,a,c}
(v)
{b,d,c}
Question
37
37.
Which of the following class intervals are in exclusive form?
a)
32 - 37 , 38 - 43 , 44 - 49,...
b)
29 - 34 , 34 - 39 , 39 - 44...
c)
14 - 19 , 20 - 25 , 26 - 31,...
d)
14 - 19 , 19 - 24 , 24 - 29,...
e)
13.5 - 19.5 , 19.5 - 25.5 , 25.5 - 31.5...
(i)
{b,d,e}
(ii)
{a,b,d}
(iii)
{c,d}
(iv)
{a,c,e}
(v)
{a,b}
Question
38
38.
The class marks of a frequency distribution are
29.5 , 35.5 , 41.5 , 47.5
.
Find the class size and class intervals
in inclusive form
(i)
5
;
27
-
32
,
32
-
37
,
37
-
42
,
42
-
47
(ii)
6
;
27
-
32
,
33
-
38
,
39
-
44
,
45
-
50
(iii)
6
;
28
-
33
,
34
-
39
,
40
-
45
,
46
-
51
(iv)
6
;
26
-
31
,
32
-
37
,
38
-
43
,
44
-
49
(v)
6
;
26
-
32
,
32
-
38
,
38
-
44
,
44
-
50
Question
39
39.
The class marks of a frequency distribution are
24 , 34 , 44 , 54
.
Find the class size and class intervals
in exclusive form
(i)
12
;
18
-
29
,
30
-
41
,
42
-
53
,
54
-
65
(ii)
10
;
19
-
29
,
29
-
39
,
39
-
49
,
49
-
59
(iii)
11
;
19
-
29
,
30
-
40
,
41
-
51
,
52
-
62
(iv)
10
;
20
-
30
,
30
-
40
,
40
-
50
,
50
-
60
(v)
10
;
18
-
28
,
28
-
38
,
38
-
48
,
48
-
58
Question
40
40.
Which of the following are continuous variables?
a)
Number of players in a team
b)
Heights of children in a class
c)
Number of members in a family
d)
Number of workers in a factory
e)
Weights of persons in a group
(i)
{c,e}
(ii)
{b,e}
(iii)
{c,e,b}
(iv)
{d,a,b}
(v)
{a,b}
Question
41
41.
Which of the following are discrete variables?
a)
Wages of workers in a factory
b)
Marks obtained by student in a particular subject
c)
Rainfall at a place over a month
d)
Number of workers in a factory
e)
Heights of children in a class
(i)
{b,d}
(ii)
{c,d}
(iii)
{c,d,b}
(iv)
{a,b}
(v)
{e,a,b}
Assignment Key
1) (iii)
2) (iii)
3) (iv)
4) (iv)
5) (ii)
6) (v)
7) (i)
8) (v)
9) (i)
10) (iv)
11) (iii)
12) (iv)
13) (i)
14) (ii)
15) (ii)
16) (iv)
17) (iii)
18) (ii)
19) (i)
20) (i)
21) (iv)
22) (ii)
23) (iv)
24) (i)
25) (i)
26) (ii)
27) (iii)
28) (iii)
29) (i)
30) (iv)
31) (i)
32) (ii)
33) (v)
34) (ii)
35) (iv)
36) (iii)
37) (i)
38) (ii)
39) (ii)
40) (ii)
41) (i)
