Tests of Difference: Mann-Whitney & Wilcoxn (AQA A-Level Psychology): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What level of data do both Mann-Whitney & Wilcoxon tests work with?
What level of data do both Mann-Whitney & Wilcoxon tests work with?
Ordinal (ranked) data
Why are non-parametric tests particularly useful in psychological research?
Why are non-parametric tests particularly useful in psychological research?
Don't require normal distribution
Which design is the Mann-Whitney U test appropriate for?
Which design is the Mann-Whitney U test appropriate for?
Independent groups design
How should data be ranked in Mann-Whitney U test?
How should data be ranked in Mann-Whitney U test?
All data from both groups together
For Mann-Whitney, when is a result statistically significant?
For Mann-Whitney, when is a result statistically significant?
Calculated U ≤ critical value
Which design is the Wilcoxon signed-rank test appropriate for?
Which design is the Wilcoxon signed-rank test appropriate for?
Repeated measures design
How should zero differences be treated in Wilcoxon test?
How should zero differences be treated in Wilcoxon test?
Exclude from ranking process
How is the T value calculated in Wilcoxon test?
How is the T value calculated in Wilcoxon test?
Sum of ranks for less frequent sign
For Wilcoxon, when is a result NOT statistically significant?
For Wilcoxon, when is a result NOT statistically significant?
Calculated T > critical value
What is the key design difference between Mann-Whitney & Wilcoxon?
What is the key design difference between Mann-Whitney & Wilcoxon?
Independent vs repeated measures