In order to determine the interquartile range, we need
A) Q₃ and Q₄.
B) Q₁ and Q₄.
C) Q₁ and Q₃.
D) Q₂ and Q₄.

Question

Quizplus · Accepted Answer

The interquartile range is the difference between the third quartile (Q₃) and the first quartile (Q₁). Therefore, we need to have both Q₁ and Q₃ to calculate the interquartile range. Q₄ does not exist as there are only three quartiles (Q₁, Q₂, and Q₃). Q₂ alone is not enough as it only represents the median and does not give us information about the spread of the data.

In Order to Determine the Interquartile Range, We Need