Mann Whitney U
Types of Data:
Level of measurement - ordinal/interval
Ordinal - dada that can be put in
Design - independent groups design
order.
Test of difference/relationship -
Interval - the next unit in the sequence
difference
is already known.
When is the finding significant - if the
Nominal - data that belongs in groups.
observed value is equal or less than the
Ordinal and interval data are
critical value, the findings are
connected as interval data can be put
significant
into order.
Formula:
Sum of rank 1
N1 - number of
participants in
condition 1
Example:
If there is the same value,
Order 3 3 5 6 9 9 12 12 12 14
having different ranks would
Initial rank 1 2 3 4 5 6 7 8 9 10 be unfair. You have to find
the mean and they use that
Actual rank 1.5 1.5 3 4 5.5 5.5 8 8 8 10
for each
State whether there is a significance? (3) If no probability is given, use 0.05
Our calculated value of x was not equal to or less than the critical value of y, therefore the
results are not significant for a 2 tailed test with a probability of 0.05. This means that
(add context from the exam question).
Types of Data:
Level of measurement - ordinal/interval
Ordinal - dada that can be put in
Design - independent groups design
order.
Test of difference/relationship -
Interval - the next unit in the sequence
difference
is already known.
When is the finding significant - if the
Nominal - data that belongs in groups.
observed value is equal or less than the
Ordinal and interval data are
critical value, the findings are
connected as interval data can be put
significant
into order.
Formula:
Sum of rank 1
N1 - number of
participants in
condition 1
Example:
If there is the same value,
Order 3 3 5 6 9 9 12 12 12 14
having different ranks would
Initial rank 1 2 3 4 5 6 7 8 9 10 be unfair. You have to find
the mean and they use that
Actual rank 1.5 1.5 3 4 5.5 5.5 8 8 8 10
for each
State whether there is a significance? (3) If no probability is given, use 0.05
Our calculated value of x was not equal to or less than the critical value of y, therefore the
results are not significant for a 2 tailed test with a probability of 0.05. This means that
(add context from the exam question).
