April 19, 2015


Posted by kelli on Thursday, October 6, 2011 at 4:51pm.

Describe in words the nature of the relationship between each pair of variables as indicated by the value of the correlation coefficient. Be sure to include

a. the direction of the relationship.
b. the strength of the relationship.
c. a verbal description of the way the variables "go together."
d. an appropriate graph of the relationship. (for the graphing portion, describe what the scatterplot should look like in terms of slope, linear characteristics, etc)

1. r = -.96 between craving for pizza and ability to concentrate on studying.
2. r = +.02 between length of marriage and marital satisfaction.
3. r = +.55 between parent and child intelligence test scores.
4. r = -.90 between amount of alcohol consumed and performance on a motor coordination task.
5. r = +.75 between amount of money won and the number of hot dogs purchased at race tracks.
6. r = +.67 between scores on a hyperactivity scale and an aggressiveness scale.
7. r = -.82 between a job applicant's age and likelihood of being hired.
8. r = +.06 between the number of yearly predictions by psychics and the number of correct predictions.


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