A random sample of 507 adults is used to investigate correlation between forearm girth and bicep girth. Software gives a product moment correlation coefficient of r=0.942r=0.942r=0.942.
Describe the direction and strength of the sample linear correlation.
Explain why printed statistical tables ending at sample size 100 cannot be used directly.
State an appropriate way to complete a hypothesis test.
Explain why a statistically significant result need not imply a useful causal relationship.
278 exam-style questions on CCEA A Level Maths 2.5 Data presentation and interpretation, covering 2.5.1 Data presentation and interpretation, 2.5.2 Data presentation and interpretation, 2.5.3 Data presentation and interpretation, 2.5.4 Data presentation and interpretation, 2.5.5 Data presentation and interpretation, 2.5.6 Data presentation and interpretation, 2.5.7 Data presentation and interpretation, 2.5.8 Data presentation and interpretation, 2.5.9 Data presentation and interpretation, and 2.5 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.