Chapter 2.1, Problem 1.4CYU

To determine

To find: $Q_1,Q_3$ and $IQR$ .

Answer to Problem 1.4CYU

  $Q_1=13\min$ , $Q_3=32\min$ and $IQR=19\min$ .

Explanation of Solution

Given information:

Graph of call length (minutes) Vs cumulative frequency $\left(\%\right)$ .

  

From the above graph it is observed that,$Q_1=13\min$

  $Q_3=32\min$

  $IQR=32-13=19\min$

Thus, $Q_1=13\min$ , $Q_3=32\min$ and $IQR=19\min$ .