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ScotlandStatisticsQuick questions

Data Analysis and Modelling

Quick questions on Bivariate data and regression: correlation, least-squares line and residual plots - SQA Advanced Higher Statistics

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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Given Sxx=50S_{xx}=50, Syy=72S_{yy}=72, Sxy=48S_{xy}=48, find rr. [2 marks]
What is q2?
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A residual plot of a fitted line shows a clear U-shape. State what this tells you. [1 mark]

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