A football coach measured the heights and weights of 12 players. The data is shown below.
| Height (cm) | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 |
| Weight (kg) | 58 | 61 | 64 | 67 | 70 | 70 | 72 | 76 | 77 | 78 | 79 | 80 |
Draw a scatter graph for this information.
Give an interpretation of the correlation between the height and weight of the footballers.
The equation of the regression line is w=2h−280w = 2h - 280w=2h−280
Give an interpretation of the gradient of this regression line.
The product moment correlation coefficient is calculated to be 0.98.
Stating your hypotheses clearly test, at the 5% significance level, whether there is a positive correlation between height and weight.
Determine whether you would reach the same conclusion at the 1% 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.