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10 cards from this deck
Variable deliberately manipulated; plotted on x-axis
Variable measured in response; plotted on y-axis
Variable kept constant throughout investigation
When data covers extremely wide range (orders of magnitude)
Continuous: any value; discrete: whole numbers only (counted)
Quantifies spread/dispersion of data around the mean
SD/√n (SD divided by square root of sample size)
Compares observed vs expected categoric data (goodness-of-fit)
+1=perfect positive; -1=perfect negative; 0=no correlation
Correlation does not prove causation
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