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Correlation and causality (two data variables relationships (Positive…
Correlation and causality
Scatterplot
graph
represents
values of two variables
two data variables relationships
Positive Correlation
Increase or decrease
Negative Correlation
change opposite directions
No correlation
no apparent variables
Correlation strength
perfect, straight line
Possible explanation
coincidence
common underlying cause
cause of the other
Establishing causality
look for situations
cause of absence or presence
evidence
the effects