In a study of attitudes towards healthy eating, researchers used a Likert-style clean eating attitude scale to compare two groups of participants. Participants in Group A were a volunteer sample of university students enrolled in a Nutrition and Dietetics course. Participants in Group B, the control group, were a volunteer sample of university students enrolled in a Business Studies course.
The researchers used an inferential statistical test to see if there was a significant difference in clean eating attitude scores between the two groups.
Explain why a Mann-Whitney test is an appropriate choice of statistical test in this situation and a Spearman's test is not.
121 exam-style questions on AQA A Level Psychology Inferential testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.