A young family were looking for a new 3 bedroom semi-detached house. A local survey recorded the price xxx, in £1000, and the distance yyy, in miles, from the station of such houses. The following summary statistics were provided
Sxx=113 573,Syy=8.657,Sxy=−808.917 S_{xx} = 113\,573, S_{yy} = 8.657, S_{xy} = -808.917 Sxx=113573,Syy=8.657,Sxy=−808.917Use these values to calculate the product moment correlation coefficient.
Give an interpretation of your answer to part (a).
State the value of the product moment correlation coefficient if distances were measured in km rather than miles.
3 exam-style questions on Edexcel A Level Old Maths Correlation and Regression. Each one has a worked solution and a mark scheme showing where the marks go.