Question detail

What does the inter-quartile range measure?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Statistical skills

Question

A. The difference between the highest and lowest values
B. The range of the middle 50% of the data
C. The average of the data set
D. The most common value in the data set

Answer

The correct answer is The range of the middle 50% of the data.

Explanation

The correct option is The range of the middle 50% of the data. The range of the middle 50% of the data is correct because it directly matches the approved learning objective to use appropriate measures of spread including range, quartiles and inter-quartile range. This belongs to Statistical skills within Statistical skills, so the answer must stay focused on the geographical process, evidence, place, or impact named by the curriculum. The other options are weaker because they move away from Statistical skills, reverse the geographical relationship, or make a broader claim than the objective supports.

Common mistake

Confusing Range and Inter-Quartile Range

Students often confuse the range with the inter-quartile range, thinking they are the same measure of spread.

Remember that the range is the difference between the highest and lowest values, while the inter-quartile range is the difference between the first and third quartiles, representing the middle 50% of the data.

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