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2.2 Data presentation and interpretation

2.2 Data presentation and interpretation

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Question 22

For 30 observations, the regression line for predicting y y\,y from x x\,x is y=51.2−1.35xy=51.2-1.35xy=51.2−1.35x.

a.

Describe the association indicated by the gradient.

[1]
b.

Estimate y y\,y when x=14x=14x=14.

[2]
c.

The observed value when x=14x=14x=14 is y=29y=29y=29. Calculate the difference between the observed and predicted values.

[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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