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Variability (A quantitative measure of the differences between scores in a…
Variability (A quantitative measure of the differences between scores in a distribution and describes the degree to which the scores are spread out or clustered together.)
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Population...
Population Variance: Represented by the symbol σ^2. Equals the mean squared distance from the mean. Population variance is obtained by dividing the sum of squares (SS) by N. (SS/N)
Population Standard Deviation: represented by the symbol σ. Equals the square root of the population variance. √SS/N
Bias
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Unbiased: If the average value of the statistic is equal to the population parameter (can be obtained in all samples).
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Quartile = Q1-Q4 (25%, 50%, 75%, 100%)
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