David wants to investigate if there is a correlation between total weekly rainfall and total weekly hours of sunshine in his town.
Suggest a suitable null and alternative hypothesis for a two-tail test.
David takes a sample of 20 weeks and finds a product moment correlation coefficient of 0.48.
Carry out the hypothesis test at the 5% significance level.
51 exam-style questions on Edexcel A Level Maths 1.3 Hypothesis Testing for Zero Correlation. Each one has a worked solution and a mark scheme showing where the marks go.