![]() ![]() However, the variance is more informative about variability than the standard deviation, and it’s used in making statistical inferences. That’s why standard deviation is often preferred as a main measure of variability. ![]() ![]() Since the units of variance are much larger than those of a typical value of a data set, it’s harder to interpret the variance number intuitively. Variance is expressed in much larger units (e.g., meters squared).Standard deviation is expressed in the same units as the original values (e.g., meters).It’s the square root of variance.īoth measures reflect variability in a distribution, but their units differ: The standard deviation is derived from variance and tells you, on average, how far each value lies from the mean. Frequently asked questions about variance. ![]()
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