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Unformatted text preview: o Add the squared deviations o Divide the sum of the squared deviations by the number of observations o Take the square root of the result Independent Variable: variable that causes a change in another variable Dependent Variable: variable that changes due to influence of another variable Correlation: Two variables related in some way, not necessarily through cause and effect Spurious correlation: casual relation is apparent between two variables when in fact none exists because a third, hidden variable causes both Scientific Control: holding a third variable constant while testing for a relationship between two variables...
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 Fall '07
 Lovaglia

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