A study of 20 students compares the time spent studying (t t\,t hours) and their final test scores (s s\,s marks).
The product moment correlation coefficient for the sample is r=0.435r = 0.435r=0.435.
Stating your hypotheses clearly test, at the 2.5% significance level, whether there is a positive correlation between study time and test scores.
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.