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Question 186

Using the Mann-Whitney U U\,U value of 16 that was calculated in part (b) (where n1=9n_1 = 9n1​=9 and n2=8n_2 = 8n2​=8), determine whether Dr. Vance's data are significant at p≤0.05 p \leq 0.05\,p≤0.05 for a non-directional (two-tailed) hypothesis. Use the table of critical values below to justify your answer.

Table of critical values for Mann-Whitney U U\,U at p≤0.05p \leq 0.05p≤0.05 (two-tailed)

n1n_1n1​n2=7n_2 = 7n2​=7n2=8n_2 = 8n2​=8n2=9n_2 = 9n2​=9
781012
8101315
9121517

Note: For significance to be shown, the calculated value of U U\,U must be equal to or less than the critical value.

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Markscheme

Methods Questions

  1. A Level
  2. /Psychology
  3. /Methods

638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.

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