Quartile Deviation

Q.

Calculate Lower Quartile and Upper Quartile from the following data :

$\begin{array}{ccccccccc}\text{X}& 0-10& 10-20& 20-30& 30-40& 40-50& 50-60& 60-70& 70-80\\ \text{f}& 15& 20& 25& 24& 12& 31& 71& 52\end{array}$

Q.

Calculate median and upper quartile for the following data :

22, 27, 15, 25, 30, 18, 27, 20, 21, 35, 23

Q. The coefficient of quartile deviation is calculated by the formula :

1. $\frac{Q_1+Q_2}{4}$
2. $\frac{Q_3+Q_1}{4}$
3. $\frac{Q_3-Q_1}{Q_3+Q_1}$
4. $\frac{Q_2+Q_1}{Q_2-Q_1}$

Q.

Listed below are the temperatures in $°C$ for $10$ days.

$–6,–8,0,3,2,0,1,5,4,4$

What is the range of the data?