Quick questions on Standard deviation: measuring and comparing spread - SQA National 5 Maths

3short 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 is q1?

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Find the mean of

4, 6, 8, 10, 12

. [1 mark]

What is q2?

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Find the standard deviation of

3, 5, 7

to 1 decimal place. [3 marks]

What is q3?

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Set A has mean

20

, SD

2

; Set B has mean

20

, SD

7

. Which is more consistent? [1 mark]

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