A football coach measured the heights and weights of 12 players, The data is shown below.
| Height (cm) | 185 | 191 | 175 | 172 | 182 | 172 | 185 | 190 | 177 | 187 | 178 | 166 |
| Weight (kg) | 67 | 97 | 80 | 66 | 74 | 55 | 87 | 83 | 68 | 91 | 65 | 58 |
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=1.37h−172w = 1.37h - 172w=1.37h−172. 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.