Mann Whitney U Test

Question 1

What do statistical tests show?

Answer 1

If the results we have found are due to chance or a link between variables.

Question 2

What is a ‘p’ value?

Answer 2

The probability or chance of something happening.

Question 3

What does it mean if a value is significant?

Answer 3

It is not due to chance and the variables do have a relationship.

Question 4

What is ‘p’ typically in psychology?

Answer 4

p</ 0.05

Question 5

What is a type 1 error?

Answer 5

When a result is found to be significant but it is actually wrong (false positive)

Question 6

What is a type 2 error?

Answer 6

When a result is found to be non-significant but it actually is (false negative).

Question 7

What is a type 1 error caused by?

Answer 7

By poor research design or using a level of significance which is too lenient.

Question 8

What is a type 2 error caused by?

Answer 8

Using a too stringent level of signifigance.

Question 9

Why might a Mann Whitney test be used?

Answer 9

-Independent measures have been used.
-Uses ordinal or interval data.
-Looking for a difference between groups.