Question

Following are the lives in hours of $15$ pieces of the components of air craft engine.
$715,724,725,710,729,745,649,699,696,712,734,728,716,705,719$

Find the median.

• A. $720$
• B. $718$
• C. $716$
• D. $721$

Answer 1

The correct option is C $716$

Arranging the data in ascending order
$649,696,699,705,710,712,715,716,719,724,725,728,729,734,745$
Since, $N=15,$ the number of observations is odd,
So Median = ${\left(\frac{N+1}{2}\right)}^{th}$ observation = ${\left(\frac{15+1}{2}\right)}^{th}$ observation $=8th$ observation $=716$