Examlex
What is the difference between reliability and validity?
Standard Deviations
A measure of the amount of variation or dispersion of a set of values, indicating how much the values differ from the mean of the set.
Variance
Variance measures the dispersion of a set of data points around their mean value, indicating how spread out the data is.
Standard Deviation
A statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.
Coefficient Of Variation
A measure of relative variability calculated as the standard deviation divided by the mean, often expressed as a percentage.
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