Clara is investigating whether there is a correlation between the age of a second-hand car and its market value.
Suggest a suitable null and alternative hypothesis for a two-tail test.
Clara takes a sample of 18 cars and finds a product moment correlation coefficient of -0.45.
Carry out the hypothesis test at the 5% significance level.
Practise Edexcel A Level Maths Regression, Correlation and Hypothesis Testing with exam-style questions for A Level Maths. 100 questions covering Exponential Models, Measuring Correlation, and Hypothesis Testing for Zero Correlation, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.