Wilcoxon rank-sum test (Mann-Whitney U test)

A question is this type if and only if it asks to test for differences between two independent samples using the Wilcoxon rank-sum or Mann-Whitney U test.

26 questions · Standard +0.3

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OCR Further Statistics 2021 June Q1
9 marks Standard +0.3
1 Jo can use either of two different routes, A or B, for her journey to school. She believes that route A has shorter journey times. She measures how long her journey takes for 17 journeys by route A and 12 journeys by route B. She ranks the 29 journeys in increasing order of time taken, and she finds that the sum of the ranks of the journeys by route B is 219 .
  1. Test at the \(10 \%\) significance level whether route A has shorter journey times than route B . [8]
  2. State an assumption about the 29 journeys which is necessary for the conclusion of the test to be valid.