Correlation Lab

Psychology 110 online Name _______________________________

Grace Chan

Correlation Lab

Positive correlation (4.5)

variable variable
units units
1 6 1 6
2 7 2 7
3 8 3 8
4 9 4 9
5 10 5 10

Scatterplot for positive correlation (see lab manual p.18)

Describe the above correlation based on the scatterplot (strength and direction):

________________________________________________________________________________

Calculate the correlation coefficient of the above (use Vassarstats – see lab manual p.19)

= ________ p (two tailed) =___________

Make a conclusion of the above correlation based on the correlation coefficient (r) and the p-value:

Negative Correlation (4.5)

variable variable
units units
1 6 1 6
2 7 2 7
3 8 3 8
4 9 4 9
5 10 5 10

Scatterplot for negative correlation (see lab manual p.18)

Describe the above correlation based on the scatterplot (strength and direction):

________________________________________________________________________________

Calculate the correlation coefficient of the above (use Vassarstats – see lab manual p.19)

= ________ p (two tailed) =___________

Make a conclusion of the above correlation based on the correlation coefficient (r) and the p-value:

________________________________________________________________________________

Answer the following: (1)

If the data suggests that the correlation between depression and anxiety is about 1.25. What can you say about the strength of the relationship?

Which correlation is stronger? r = .06 or r = -.06