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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 25

A sample product moment correlation coefficient is r=0.58r=0.58r=0.58. For a one-tailed test at the 5% significance level, the critical value is 0.6215 when n=9n=9n=9 and 0.5494 when n=12n=12n=12.

a.

State the conclusion if n=9n=9n=9.

[2]
b.

State the conclusion if n=12n=12n=12.

[2]
c.

Explain why the conclusions can differ although r r\,r is unchanged.

[2]
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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