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Psych GRE formulas
Formulas that may appear on Psychology GRE
Question | Answer |
---|---|
Mean | (sum of observations) divided by (number of observations) |
Median | The number that divides the data in half. |
Mode | The number with the highest frequency. |
Range | Highest score-minus-lowest score. |
Standard deviation | The square root of the variance. |
Variance | The square of the standard deviation (or, to put it another way, the standard deviation times the standard deviation). |
z-score | (your score minus the mean) divided by (standard deviation) |