Class Marks

Q.

Fill in the blanks :
(i) Lower class limit of 15-18 is ___ .
(ii) Upper class limit of 24-30 is ___.
(iii) Upper limit of 5-12.5 is ___.
(iv) If the upper and the lower limits of a class interval are 16 and 10; the class interval is ___.
(v) If the lower and the upper limits of a class interval are 7.5 and 12.5; the class interval is ___.

Q.

Class-mark of the class-interval 35 - 55 is

1. 35

2. 45

3. 55

4. 90

Q. The class mark of the class 70-80 in case of exclusive class interval is ______.

1. 75
2. 80
3. 70
4. 85

Q. Find the class mark for the class interval '5 - 10'.

1. 6.5
2. 5.5
3. 7.5
4. 4.5

Q.

The class mark of class $90-130$ is?

Q.

Class mark of a certain class interval is 30 and its lower class limit is 20. Then its upper class limit is

1. 35

2. 40

3. 50

4. 60

Q.

$\begin{array}{cc}\text{Class interval}& \text{Class mark}\\ 0-10& A\\ 10-20& B\\ 20-30& 25\\ 30-40& 35\end{array}$

The value of A & B are:

1. 3, 8

2. 3, 7

3. 2, 7

4. 2.5, 7.5

Q.

The class width is 5, the lower-class limit is 10, what is the upper-class limit of the same class?

1. 15

2. 30

3. 25

4. 20

Q. In a frequency distribution, class mark of a class interval is 18 and class length is also 18. The lower boundary of the class is ___.

1. 9
2. 36
3. 54
4. 27

Q.

What do you call the value that is halfway between the upper and lower limits of a class interval?

__

Q.

If the class mark of a class interval is 25, then the sum of its lower and upper class limits is

1. 0

2. 25

3. 50

4. 10

Q. Class mark of a class is 30 and class length is 36 in a grouped frequency distribution. The lower boundary of the class is ______.

1. 36
2. 48
3. 12
4. 16

Q.

The upper limit of the class interval 150-200 is:

1. 175

2. 200

3. 150

4. 100

Q.

Four alternative options are given for each of the following statements. Select the correct option.

In inclusive form, the actual upper limit and lower limit of class interval (0 - 4) are:

A. −0.5 & 3.5

B. 0.5 & 4.5

C. −1 & 5

D. 1 & 5

Q.

What will be the first class interval, if the fifth class interval is $68-72$, the fourth class interval is $64-68$?

1. $56-60$

2. $52-56$

3. $60-64$

4. $64-68$

Q. In a frequency distribution, class mark of a class is 25 and the lower boundary of the class is 9. Find the class length.

1. 41
2. 9
3. 32
4. 50

Q. In a grouped frequency distribution, the value of each observation of a particular class is assumed to be an average of upper and lower boundaries of that class. This value is called________.

1. Class length
2. Distributed average
3. Class mark
4. Average length

Q.

The lower limit of a class interval 142.5 - 147.5 is ______ .

1. 142

2. 142.5

3. 147

4. 147.5

Q. In a frequency distribution, if the upper boundary of the class is 2 times the lower boundary of the class. What are the class mark and class length in terms of the lower limit?

1. Class marks is 2 times of lower boundary and class length is equal to lower boundary.
2. Class marks is 1.5 times of lower boundary and class length is 2 times of lower boundary.
3. Class marks is 1.5 times of lower boundary and class length is equal to lower boundary.
4. Class marks is equal to lower boundary and class length is 1.5 times of lower boundary.

Q.

Four alternative options are given for each of the following statements. Select the correct option.

In an exclusive class interval (10 - 20), the lower real limit is:

A. 20

B. 10

C. 10.5

D. 20.5

Q.

Class-mark of the class interval 20-30 is

1. 20

2. 25

3. 30

4. 50

Q.

Match the two columns
$\begin{array}{ccc}& \text{Column-I \& Column-II}& \\ & \text{(A)The class mark of the class interval}& \text{(p)}13\\ & \text{145-150 is}& \\ & \text{(B)In a frequency distribution, the mid – value of a}& \text{(q)22.5–27.5}\\ & \text{class is 10 and width of each class is 6. The upper}& \\ & \text{limit of the class is}& \\ & \text{(C)The class marks of a frequency distribution are}& \text{(r)147.5}\\ & \text{15, 20, 25, 30, .....}\text{The class corresponding to the class}& \\ & \text{mark 25 is}& \end{array}$

Choose the correct option:

1. A-p; B-r; C-q

2. A-p; B-q; C-r

3. A-q; B-p; C-r

4. A-r; B-p; C-q

Q.

The upper limit of the class interval 150-200 is:

1. 175

2. 200

3. 150

4. 100

Q.

Find the missing number.

$\begin{array}{ccccc}\text{X}& \text{9}& \text{12}& & \text{18}\\ \text{Y}& \text{6}& \text{8}& \text{16}& \text{12}\end{array}$

___

Q.

The upper class limit of the class interval 40 - 90 is

1. 55

2. 80

3. 90

4. 40

Q.

What is the width of the class interval 50-90?

1. 60

2. 30

3. 40

4. 50

Q.

If the upper and the lower class limits of a class interval are 15 and 20, then the class-interval is

1. 14 - 20

2. 15 - 21

3. 16 - 19

4. 15 - 20

Q.

The lower limit of a class interval 142.5 - 147.5 is ______ .

1. 147

2. 147.5

3. 142

4. 142.5

Q.

What will be the class interval for the given mid values

5 10 15 20 25 30 35 40.

Q.

Four alternative options are given for each of the following statements. Select the correct option.

The size or width of the Class interval (0 - 4) is

A. 4

B. 5

C. 3

D. 0