The median of the data 28,31,42,37,26,34,18,23 is:

First, arrange the data in ascending order:
18,23,26,28,31,34,37,42
The total number of observations (n) is 8 (which is even).

For an even number of observations, the median is the average of the (
2
n
​
)
th
and (
2
n
​
+1)
th
terms.

Here:

(
2
8
​
)
th
 term=4
th
 term=28
(
2
8
​
+1)
th
 term=5
th
 term=31
Therefore, the median is:

Median=
2
28+31
​
=
2
59
​
=29.5