PSY207Formulae

PSY207Formulae - 1 PSY 207: Psychological Statistics...

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Unformatted text preview: 1 PSY 207: Psychological Statistics Formula Sheet M = X n Sample Mean N X = Population Mean SS = ( X ) 2 Sum of Squared Deviations (Definitional; Population) SS = ( X M ) 2 Sum of Squared Deviations (Definitional; Sample) SS = X 2 ( X ) 2 N Sum of Squared Deviations (Computational; Population) SS = X 2 ( X ) 2 n Sum of Squared Deviations (Computational; Sample) 2 = SS N Population Variance = SS N Population Standard Deviation s 2 = SS n 1 Sample Variance s = SS n 1 Sample Standard Deviation z = X z-Score (for Raw Score) X = + z Raw Score (from z-Score) M = n Standard Error of the Mean z = M M z-Score (for Sample Mean) d = M Cohens d (for z-Scores) t = M s M t Test for a Single Sample s M = s 2 n = s n Estimated Standard Error (Single Sample) d = M s Cohens d (for t for Single Sample) 2 r 2 = t 2 t 2 + df Proportion of Variance Accounted for t = M 1 M...
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This note was uploaded on 08/22/2011 for the course PSY 207 taught by Professor Pfordesher during the Fall '07 term at SUNY Buffalo.

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PSY207Formulae - 1 PSY 207: Psychological Statistics...

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