What is the median of the following observations: 34, 21, 89, 45, 66, 11, 38, 57?

Explanation: The median is the middle observation after sorting the data in ascending or descending order. For data with an odd number of observations, it is the middle observations. For data with an even number of observations, it is the average of the middle two observations. These observations would be sorted as:

11, 21, 34, 38, 45, 57, 66, 89

The middle two observations are 38 and 45; their average is 41.5. There is an even number of observations.