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Correlation

Question 3

A football coach measured the heights and weights of 12 players, The data is shown below.


Height (cm)	188	194	178	175	185	175	188	193	180	190	181	169
Weight (kg)	70	100	83	69	77	58	90	86	71	94	68	61

Draw a scatter graph for this information.

[1]

Give an interpretation of the correlation between the height and weight of the footballers.

[1]

The equation of the regression line is $w = 1.37 h - 173$ . Give an interpretation of the gradient of this regression line.

[1]

Use the equation of the regression line to estimate the weight of a player who is 170cm tall.

[1]

Comment on the reliability of your estimate in part (d), giving a reason for your answer.

[1]

Markscheme

Correlation Questions

A Level
Maths
Correlation

5 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.

Correlation

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Correlation

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Question 3

A football coach measured the heights and weights of 12 players, The data is shown below.


Height (cm)	188	194	178	175	185	175	188	193	180	190	181	169
Weight (kg)	70	100	83	69	77	58	90	86	71	94	68	61

Draw a scatter graph for this information.

[1]

Give an interpretation of the correlation between the height and weight of the footballers.

[1]

The equation of the regression line is $w = 1.37 h - 173$ . Give an interpretation of the gradient of this regression line.

[1]

Use the equation of the regression line to estimate the weight of a player who is 170cm tall.

[1]

Comment on the reliability of your estimate in part (d), giving a reason for your answer.

[1]

Markscheme

Correlation Questions

A Level
Maths
Correlation

5 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.