Question

What is the interquartile range for this data?

120, 140, 160, 180, 200, 220, 240

Answer 1

Explanation:

The data is already in ascending order.

The lower half of the data (120, 140, 160)

has the median 140.

180 is the median of the entire data.

The upper half of the data (200, 220, 240)

has the median 220.

Interquartile Range = 220 - 140 = 80.