Consider the following sample of numbers: 9, 18, 11, 14, 15, 17, 10, 69, 11,…

Solution:

Step 1: Sort the numbers: 9, 10, 11, 11, 13, 14, 15, 17, 18, 69.

1. Count the observations: there are 10, which is even.

2. For an even number of observations, the median is the average of the two middle values (the 5th and 6th values here).

3. The 5th value is 13 and the 6th value is 14, so the median = (13 + 14) / 2 = 13.5.

Therefore the median of the sample is 13.5.