Chapter 7 Puzzle

1. half the scores are above this
3. a type of correlation reflected by a downward sloping line on a scatterplot
4. the correlation you should get if two variables are unrelated
7. a type of correlation that gives us a reason to compute correlation coefficients
8. a possible problem with archival research

2. a strength of archival research
5. this coefficient reflects the size of the relationship and r-squared
6. if this happens to the range of scores, you may fail to see that two variables are related

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