The engine size and fuel consumption for 12 different models of cars are recorded.
Suggest a null and alternative hypothesis for a two-tailed test to investigate whether there is a correlation between engine size and fuel consumption.
The product moment correlation coefficient is calculated to be r=0.45r = 0.45r=0.45.
Test your hypotheses at the 5% significance level.
178 exam-style questions on WJEC A Level Maths 4.3.1 Statistical hypothesis testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.