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whats a correlation
measures relationship between 2 co variables (continuous variables)
what type of graph is a relationship of a correlation plotted on
scattergram (each axis represents one of variables investigated)
whats correlation coefficient
the calculated value of a statistical test thats somewhere between -1 and +1
this determines strength and direction of relationship between the 2 variables
if coefficient is closer to +1 or -1 = stronger relationship
if closer to zero = weaker relationship
the signs just indicate the direction (negative or positive correlation)
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