For 10 paired observations, ∑x=50\sum x=50∑x=50, ∑y=80\sum y=80∑y=80, ∑x2=290\sum x^2=290∑x2=290, ∑y2=700\sum y^2=700∑y2=700 and ∑xy=430\sum xy=430∑xy=430.
Calculate and interpret the product-moment correlation coefficient.
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.