Mann Whitney U test

Question 1

what are the 3 justifications for using the Mann Whitney U test

Answer 1

• testing for a difference
• ordinal data
• unrelated design (independent groups)

Question 2

what is the calculated value sign in Mann U Whitney

Answer 2

“U”

Question 3

how many N (participant numbers) are there in the Mann U Whitney test and why?

Answer 3

2 independent groups so 2 N values (participants numbers) to look at on the critical value table

Question 4

what are the 6 steps to interpreting a Mann U Whitney test

Answer 4

• check if hypothesis is 1 or 2 tailed
• P level
• number of participants in each conditions for the N number
• find critical value from critical value table
• compare critical value to calculated value you will be given in the question
• calculated value must be less than or equal to the critical value to be significant