The median of the observations 54, 65, 77, 34, 68, 66, 60, 70, 33, 71 and 15 is:

Correct option is D

Given:

Observations: 54, 65, 77, 34, 68, 66, 60, 70, 33, 71, 15

Formula Used:

For n odd:

Median  = $$\text{Value at } \left( \frac{n + 1}{2} \right)^\text{th} \text{ position}$$​​

Solution:

Arrange in ascending order

15, 33, 34, 54, 60, 65, 66, 68, 70, 71, 77

Total observations = 11 (odd)

Position of median:

​$$\frac{11 + 1}{2} = 6^\text{th} \text{ value}$$​​

Median = 6th value = 65