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2.2 Data presentation and interpretation

2.2 Data presentation and interpretation

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Question 13

The regression line for predicting height h h\,h cm from age a a\,a years for children aged 5 to 12 is h=6.1a+78h=6.1a+78h=6.1a+78.

a.

Estimate the height of a child aged 10.

[2]
b.

Interpret the gradient.

[1]
c.

Give two modelling concerns about using the line to predict the height of a 30-year-old adult.

[2]
Markscheme

2.2 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data presentation and interpretation

105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, and 2.2 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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