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13 cards from this deck
Measure of how close points lie to a straight line
Product Moment Correlation Coefficient
Perfect linear positive correlation
Perfect negative correlation
No correlation
0<r<0.50 < r < 0.50<r<0.5
−0.5<r<0-0.5 < r < 0−0.5<r<0
rrr close to 111
rrr close to −1-1−1
Causation
Mean point (ar{x}, ar{y})
Making predictions beyond the data set
Unreliable
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