Continuous Grouped Data

Q.

The class - mark of class interval 10-15 is _____________

1. 12

2. 12.5

3. 11.5

4. 25

Q.

The class - mark of class interval 10-15 is _____________

1. 12.5

2. 11.5

3. 12

4. 25

Q. Class intervals in a frequency distribution are $(3-6),(7-10),(11-14),(15-18)$ etc. The actual upper limit of the class interval $(7-10)$ is

1. $10+\frac{1}{2}(11-10)$
2. $10-\frac{1}{2}(11-10)$
3. $10+\frac{1}{2}(11+10)$
4. $10-\frac{1}{2}(11+10)$

Q.

Match the two columns
$\begin{array}{cc}Column-I& Column-II\\ \text{(A) The class mark of the class interval}& \text{(p) 13}\\ 145-150is& \\ \text{(B) In a frequency distribution, the mid – value of a}& \text{(q) 110}\\ \text{class is 10 and width of each class is 6. The upper}& \\ \text{limit of the class is}& \\ \text{(C) The mean of eight numbers is 40. If one}& \text{(r) 22.5 – 27.5}\\ \text{number is excluded, their mean becomes 30.}& \\ \text{The excluded number is}& \\ \text{(D) The class marks of a frequency distribution are}& \left(s\right)147.5\\ 15,20,25,30,\dots \dots \text{The class corresponding to the class}& \\ \text{mark 25 is}& \end{array}$
Choose the correct option:

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

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

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

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

Q. The lower limit of class interval $0-5$ is _____ and upper limit is _____.

1. $0,5$
2. $0.1,4.9$
3. $2.5,2.5$
4. None of these
   

Q. What is the class mark of the class interval 40.5 - 50.5?

1. 40.5
2. 45.5
3. 50.5
4. 91