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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 2
50%

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

Height (cm)188194178175185175188193180190181169
Weight (kg)7010083697758908671946861
a.

Draw a scatter graph for this information.

[2]
b.

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

[1]
c.

The equation of the regression line is w=1.37h−173w = 1.37h - 173w=1.37h−173

Give an interpretation of the gradient of this regression line.

[1]
d.

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

[2]
e.

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

[1]
Markscheme

2.2 Data Presentation and Interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data Presentation and Interpretation

121 exam-style questions on OCR A Level Maths 2.2 Data Presentation and Interpretation, covering 2.2.1 Tables and diagrams for single variable data, 2.2.2 Area in a histogram, 2.2.3 Scatter diagrams and regression lines, 2.2.4 Informal interpretation of correlation, 2.2.5 Correlation and causation, 2.2.6 Measures of average and spread, 2.2.7 Calculations of mean and standard deviation, 2.2.8 Outliers, 2.2.9 Selecting or critiquing data presentation, and 2.2.10 Cleaning data. Each one has a worked solution and a mark scheme showing where the marks go.

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