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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 12

A two-tailed test of $H_0: ho=0iscarriedoutusing22pairedobservations.Theobservedvalueisis carried out using 22 paired observations. The observed value isiscarriedoutusing22pairedobservations.Theobservedvalueisr=-0.515$. The two-tailed p-value is 0.0142.

a.

Complete the test at the 2% significance level.

[3]
b.

Without further calculation, state the conclusion at the 1% significance level.

[2]
c.

Explain why replacing the alternative hypothesis by $H_1: ho<0,$ after seeing the data would be inappropriate.

[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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