Frequently Asked Questions
What is the difference between population and sample standard deviation?
Population standard deviation divides by N (total count), while sample standard deviation divides by N-1 to correct for bias when working with a subset of data.
What is the relationship between variance and standard deviation?
Standard deviation is the square root of variance. Variance measures the average squared deviation from the mean, while standard deviation returns that measure to the original unit.
What does a high standard deviation mean?
A high standard deviation indicates that data points are spread far from the mean, meaning greater variability in the data set.
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