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Variance
The variance, symbolized as , is a measure of variability defined as the mean of the squared differences between each score and the distribution's mean. While variance is a foundational measure in inferential statistics, its square root—the standard deviation—is typically used in descriptive statistics.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of Variability in Distributions
Range
Variance
Standard Deviation
What do measures of dispersion primarily describe within a dataset?
What does a standard deviation measure in a dataset?
Which of the following best describes what a high standard deviation indicates about a dataset?
If a dataset has a low standard deviation, what can be inferred about the data points?
Which of the following statements is true about standard deviation?
Pooled Within-Groups Standard Deviation
Standard Error
Statistical Standard Deviation Formula
Variance
Example of Standard Deviations in Distributions
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Formula for the Standard Deviation
Formula for the Standard Deviation
Which statistical measure is defined as representing the average distance that individual scores within a distribution deviate from the overall average?