Amy wants to find out if there is a correlation between daily maximum relative humidity and daily mean pressure.
Suggest a suitable null and alternative hypothesis for a two-tail test.
Amy takes a sample of 14 days and finds that there is evidence to suggest there is a correlation between daily maximum relative humidity and daily mean pressure.
Given that the product moment correlation coefficient is negative, find the critical value which the coefficient must be less than at the 5% significance level.
340 exam-style questions on Edexcel A Level Maths Regression, Correlation and Hypothesis Testing, covering 1.1 Exponential Models, 1.2 Measuring Correlation, and 1.3 Hypothesis Testing for Zero Correlation. Each one has a worked solution and a mark scheme showing where the marks go.