Quartile for Grouped Data

Q.

Find the inter quartile range for the following Data

$\begin{array}{ccc}\text{Class}& \text{Frequency}& \text{Cumulative Frequency}\\ 10-20& 4& 4\\ 20-30& 3& 7\\ 30-40& 2& 9\\ 40-50& 1& 10\\ 50-60& 5& 15\end{array}$

1. 20

2. 54

3. 34

4. 50

Q.

The given table shows the Marks obtained by students in Mathematics.

$\begin{array}{cc}\text{Marks}& \text{No. of Students}\\ 0-10& 3\\ 10-20& 7\\ 20-30& 12\\ 30-40& 15\\ 40-50& 20\\ 50-60& 9\\ 60-70& 8\\ 70-80& 16\\ 80-90& 14\\ 90-100& 6\end{array}$

Using the table determine the Lower Quartile by drawing an ogive curve.

1. 36

2. 34

3. 30

4. 32

Q.

The given table shows the Marks obtained by students in Mathematics.

$\begin{array}{cc}\text{Marks}& \text{No. of Students}\\ 0-10& 3\\ 10-20& 7\\ 20-30& 12\\ 30-40& 15\\ 40-50& 20\\ 50-60& 9\\ 60-70& 8\\ 70-80& 16\\ 80-90& 14\\ 90-100& 6\end{array}$

Using the table determine the InterQuartile Range by drawing an ogive curve.

1. 40

2. 42

3. 45

4. 48