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PSYB07H3 (20)
Final

EXAM REVIEW CORRELATION COEFFICIENT

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Department
Psychology
Course
PSYB07H3
Professor
Douglas Bors
Semester
Fall

Description
AFTER MIDTERM EXAM NOTESPEARSONPRODUCT MOMENT CORRELATION COEFFICIENT rtells us the strength of the relationship between x and ythe average product of zscoressame thing as z scorescorrelation coefficients are the covariance when there are standard variablesstandardize x but leave y and its useget a measure in y unitsCOVa measure of the relation between x and ythe covariance xystandardized by the standard deviation of x and yto standardizewe divide the covariance by the size of the standard deviationsgiven that the maximum value of the covariance is plus or minus the product of the variance of x and the variance of y it follows that the limits on the correlation coefficient are 10 or10the correlation coefficient is not an unbiased esimatorCOVxyrssxyIf the regression coefficient is computed the slopes can be he same but the correlation is different ie the second scatterplot has more noiseExampleyx494311014112050111641347x11ys158y
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