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Psychology Statistics Formulas
Typology: Exams
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Range - r Mean of sample size - x̅ Mean of population - μ Sum of Squares - SS Sample Standard Deviation - s -the square root of the variance Sample Standard Deviation Squared (variance) - s^ Population Standard Deviation - σ -the square root of the population variance population standard deviation squared (variance) - σ^
Sample Estimated Standard Error - Sx̅ Population Estimated Standard Error - σx̅ Independent Sample T-Test - s(x̅1-x̅2) Pooled Standard Deviation (ISTT) - Sp Dependent Sample t-Test - Sx̅d Correlation - Rxy Internal Consistency Reliability (Cronbach's Alpha) - a Z-Test Statistic - Zx̅ Z-score - Zi One Way t-test - tx̅
n^ n - Sample size N - population size h - high l - low E - Sum Xi - participant score k - groups nt - total number of participants
