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10 questions from this quiz
Linear correlation
rrr has no units; it is a pure number
When both lie on same side of means
Clustering of points & gradient sign
(xห,yห)(\bar{x}, \bar{y})(xห,yหโ)
Sum of squares of vertical distances
They are identical
Moderate positive correlation
b=yหโmxหb = \bar{y} - m\bar{x}b=yหโโmxห
Weak negative correlation
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