Quick questions on Data presentation and interpretation: averages, spread, outliers and regression - Edexcel A-Level Maths

2short 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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For data with

\sum x = 50

\sum x^2 = 310

and

n = 10

, find the mean and standard deviation. [3 marks]

What is q2?

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A box plot has

Q_1 = 12

and

Q_3 = 20

. Determine the outlier boundaries using

1.5 \times \text{IQR}

. [3 marks]

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