Davina wants to test to see if there is a correlation between the number of letters in someone's name and their salary.
She calculates the product moment correlation coefficient between these two variables for a random sample of 40 people and obtains r=−0.289r = -0.289r=−0.289
Carry out a suitable test to investigate Davina's belief at a 5% 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.
