Statistics for the Behavioral Sciences exam 3 (questions and answers)complete
Correlation does not imply... - causation The covariance ___ as the two variables show a ___ to ___ together. - increases, greater tendency, vary If your null hypotheses is ____ then there is ___. - (rho) = 0, no correlation What are the degrees of freedom for Pearson's r? - df = N-2 rho - null hypothesis value (r) bivariate outlier - an outlier with two variables that don't correlate Use Pearson's r for - reliability criterion validity measures the degree of association between 2 variables that are not obviously related When sample size increases, Pearson's r becomes ___ significant - more Very small samples tend to... - inflate r As correlation goes up, what happens to error? - It goes down The slope in the equation of a regression line represents... - the standard deviationWhat is the rule for predicting z-scores given r? - zy' = rz(sub x) If r=0 then our best prediction is... - the mean
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