#### Answer

3.5

#### Work Step by Step

To find the median, list the numbers in order and locate the number that is at the midpoint of the list.
When the number of data items is even, the median is the mean of the two numbers located at the midpoint of the list.
$1, 2, 3, \underset\uparrow3, \underset\uparrow4, 5, 7, 8$
$\frac{3+4}{2}=3.5$