A scientist suspects there is a positive correlation between the concentration of a certain nutrient in soil and the height of the plants grown in it.
He calculates the product moment correlation coefficient for a random sample of 12 plants and obtains r=0.468r = 0.468r=0.468.
Carry out a suitable test to investigate the scientist's suspicion 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.
