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14 cards from this deck
rrr
Strength and direction of linear relationship
−1-1−1 to +1+1+1
Perfect positive correlation
Perfect negative correlation
No linear correlation
Number of data points
Organise data: table with xxx, yyy, x2x^2x2, y2y^2y2, xyxyxy
Calculate sumxsum xsumx, sumysum ysumy, sumx2sum x^2sumx2, sumy2sum y^2sumy2, sumxysum xysumxy
Substitute values into formula
Direct correlation
Inverse correlation
Weak or no correlation
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