Marcus wants to test to see if there is a correlation between the age of a car, in years, and its fuel efficiency, in miles per gallon.
He calculates the product moment correlation coefficient between these two variables for a random sample of 30 cars and obtains r=0.35r = 0.35r=0.35.
Carry out a suitable test to investigate Marcus's belief at a 10% level of significance.
State clearly
Practise Edexcel A Level Maths Hypothesis Testing for Zero Correlation with exam-style questions for A Level Maths. 52 questions, 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.
