A football coach measured the heights and weights of 12 players, The data is shown below.
| Height (cm) | 168 | 172 | 176 | 176 | 180 | 180 | 180 | 180 | 184 | 184 | 188 | 192 |
| Weight (kg) | 67 | 67 | 79 | 72 | 82 | 81 | 79 | 78 | 89 | 82 | 87 | 97 |
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=1.25h−145w = 1.25h - 145w=1.25h−145. Give an interpretation of the gradient of this regression line.
Use the equation of the regression line to estimate the weight of a player who is 170cm tall.
Comment on the reliability of your estimate in part (d), giving a reason for your answer.
46 exam-style questions on Edexcel A Level Maths Correlation, covering 4.1 Correlation and 4.2 Linear Regression. Each one has a worked solution and a mark scheme showing where the marks go.