Question

what is the median? 9,528 9,539 9,520 9,534 -9,540 9,534 9,558 9,529 9,527 9,530

Explanation:

Step1: Arrange data in ascending order

$-9,540, 9,520, 9,527, 9,528, 9,529, 9,530, 9,534, 9,534, 9,539, 9,558$

Step2: Determine the middle - value

There are $n = 10$ data points. Since $n$ is even, the median is the average of the $\frac{n}{2}$th and $(\frac{n}{2}+ 1)$th ordered values. $\frac{n}{2}=5$ and $\frac{n}{2}+1 = 6$. The 5th value is $9,529$ and the 6th value is $9,530$.
Median=$\frac{9529 + 9530}{2}=\frac{19059}{2}=9529.5$

Answer:

$9529.5$