There is such a set of data: 6, 9, 11, 8, 13, 17 What is the median of this set of data.
有这样一组数据：6、9、11、8、13、17这组数据的中位数是多少．
<gadget id="calculator">9 + 11</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>