University of Phoenix Material
Correlation
Study Worksheet
Your research team has been tasked with
finding the correlation of the following scenario:
Four research
participants take a test of manual dexterity (high scores mean better
dexterity) and an anxiety test (high scores mean more anxiety). The scores are
as follows:
Person Dexterity Anxiety
1 1 10
2 1 8
3 2 4
4 4 -2
Describe the
process that your research team would go through by completing the following:
- Make a
scatter diagram of the scores. - Describe
in words the general pattern of correlation, if any. - Figure
the correlation coefficient. - Figure
whether the correlation is statistically significant (use the .05
significance level, two-tailed). - Explain
the logic of what you have done, writing as if you are speaking to someone
who has never heard of correlation (but who does understand the mean,
standard deviation, Z scores,
and hypothesis testing). - Give
three logically possible directions of causality, indicating for each
direction whether it is a reasonable explanation for the correlation in
light of the variables involved (and why).
References
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