Decision-Based Learning - Reporting Mann Whitney u test in APA

1. Reporting Mann Whitney U
Test in APA

2. In this short tutorial you will see a problem that can be
investigated using the Mann Whitney U Test.

3. In this short tutorial you will see a problem that can be
investigated using the Mann Whitney U Test.
You will then see how the results of the analysis can be
reported using APA style.

4. Problem:
With this information she will determine how much
inventory she needs during football and basketball
seasons. She asks you to set up a study, collect the
data, run the analysis and interpret the results for her.
After collecting the data you realize that there are
some extreme outliers among basketball players that
may skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

5. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

6. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

7. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

8. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

9. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

10. Problem:
A pizza café owner wants to know who eats more slices
of pizza: football or basketball players. With this
information she will determine how much inventory
she needs during football and basketball seasons. She
asks you to set up a study, collect the data, run the
analysis and interpret the results for her. After
collecting the data you realize that there are some
extreme outliers among basketball players that may
skew the results. You determine to run a Mann
Whitney U test. How would you state the null-hypothesis?

11. Here is one general template for reporting a Mann
Whitney U test:

12. A Mann-Whitney test indicated that the [insert
dependent variable] was greater for [insert level 1 of
the independent variable] (Mdn = ___) than for [insert
level 2 of the independent variable] (Mdn = ___), U=
_._, p = ._ _ _.

13. A Mann-Whitney test indicated that the [insert
dependent variable] was greater for [insert level 1 of
the independent variable] (Mdn = ___) than for [insert
level 2 of the independent variable] (Mdn = ___), U=
_._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

14. A Mann-Whitney test indicated that the [insert
dependent variable] was greater for [insert level 1 of
the independent variable] (Mdn = ___) than for [insert
level 2 of the independent variable] (Mdn = ___), U=
_._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

15. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for [insert level 1 of the
independent variable] (Mdn = ___) than for [insert
level 2 of the independent variable] (Mdn = ___), U=
_._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

16. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for [insert level 1 of the
independent variable] (Mdn = ___) than for [insert
level 2 of the independent variable] (Mdn = ___), U=
_._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

17. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = ___) than for
[insert level 2 of the independent variable] (Mdn =
___), U= _._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

18. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
[insert level 2 of the independent variable] (Mdn =
___), U= _._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.
This is the
median for
football players

19. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
[insert level 2 of the independent variable] (Mdn =
___), U= _._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

20. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
basketball players (Mdn = ___), U= _._, p = ._ _ _.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

21. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
basketball players (Mdn = 5), U= _._, p = ._ _ _.
This is the median
for basketball
players
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

22. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
basketball players (Mdn = 5), U= 67.5, p = ._ _ _.
This U value is used to
determine statistical
significance.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

23. A Mann-Whitney test indicated that the slices of pizza
eaten was greater for football (Mdn = 9) than for
basketball players (Mdn = 5), U= 67.5, p = .034.
The statistical significance value meaning
that if we were to replicate this study 1000
times, we would be wrong 34 times.
A pizza café owner wants to know who eats more
slices of pizza: football or basketball players. With
this information she will determine how much
inventory she needs during football and basketball
seasons.

24. Here is our reported result:

25. A Mann-Whitney test indicated that the slices of pizza
eaten was significantly greater for football players
(Mdn = 9) than for basketball players (Mdn = 5),
U = 67.5, p = .034.