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10 cards from this deck
Strength & direction of correlation between two variables
+1.0 (perfect positive) to -1.0 (perfect negative)
Correlation does not prove a causal link
Difference in ranking between paired data sets
Number of sets of paired data
At least 10 sets of paired data
No more than 30 sets of paired data
As one variable increases, the other also increases
As one variable increases, the other decreases
Data must be capable of being ranked highest to lowest
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