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Regression, Correlation and Hypothesis Testing

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Question 119

James runs a fish and chip shop. He records the average daily temperature, t∘Ct^{\circ}\text{C}t∘C, and the daily sales, £S\pounds S£S, for 9 days in the summer. The product moment correlation for these data is 0.58

James calculated the linear regression equation as S=4826+156tS = 4826 + 156tS=4826+156t

Give an interpretation of the gradient of this regression equation.

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Markscheme

Regression, Correlation and Hypothesis Testing Questions

  1. A Level
  2. /Maths
  3. /Regression, Correlation and Hypothesis Testing

340 exam-style questions on Edexcel A Level Maths Regression, Correlation and Hypothesis Testing, covering 1.1 Exponential Models, 1.2 Measuring Correlation, and 1.3 Hypothesis Testing for Zero Correlation. Each one has a worked solution and a mark scheme showing where the marks go.

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