Quick questions on Statistical diagrams and sampling - SQA Higher Applications of Maths

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are data types?

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Data is quantitative (numerical, either discrete counts or continuous measurements) or qualitative (categories). The type guides which diagram and which average suit it.

What is q1?

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A data set has

Q_1 = 22

and

Q_3 = 34

. Find the IQR and the upper outlier boundary. [2 marks]

What is q2?

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Two teams' scores have medians

18

and

24

and IQRs

9

and

4

. Compare them in context. [2 marks]

What is q3?

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A school wants a sample reflecting its year groups, which differ in size. Name a suitable sampling method and why. [2 marks]

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