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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 156

For runners, a regression line for recovery time y y\,y minutes on training distance x x\,x km is y=18.4−0.62xy=18.4-0.62xy=18.4−0.62x.

a.

Estimate the recovery time when x=12x=12x=12.

[1]
b.

Interpret the gradient.

[1]
c.

State why using the line for x=40x=40x=40 may be unreliable if the observed distances were 5 to 20 km.

[1]
Markscheme

2.5 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.5 Data presentation and interpretation

278 exam-style questions on CCEA A Level Maths 2.5 Data presentation and interpretation, covering 2.5.1 Data presentation and interpretation, 2.5.2 Data presentation and interpretation, 2.5.3 Data presentation and interpretation, 2.5.4 Data presentation and interpretation, 2.5.5 Data presentation and interpretation, 2.5.6 Data presentation and interpretation, 2.5.7 Data presentation and interpretation, 2.5.8 Data presentation and interpretation, 2.5.9 Data presentation and interpretation, and 2.5 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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