Question

what is the median? 20 19 5 1 15 30 9

Explanation:

Step1: Sort the data

Sort the numbers in ascending order: \(1,5,9,15,19,20,30\)

Step2: Find the median

Since there are \(n = 7\) (odd number of data points), the median is the \(\frac{n + 1}{2}\) -th value.
\(\frac{7+ 1}{2}=4\) -th value.
The \(4\) -th value in the sorted list \(1,5,9,15,19,20,30\) is \(15\).

Answer:

\(15\)