The standard deviation of a random variable, sample, statistical population, data set, or probability distribution is the square root of its variance. (For a finite population, variance is the average of the …

Jun 4, 2025 · What Is Standard Deviation? Standard deviation is a statistical measurement that looks at how far discrete points in a dataset are dispersed from the mean of that set.

The standard deviation (SD) is a single number that summarizes the variability in a dataset. It represents the typical distance between each data point and the mean.

Deviation just means how far from the normal. The Standard Deviation is a measure of how spreadout numbers are.

Dec 12, 2025 · standard deviation, in statistics, a measure of the variability (dispersion or spread) of any set of numerical values about their arithmetic mean (average; denoted by μ).

Jan 2, 2025 · Standard deviation is a statistical measure that shows how much a group of data is spread out or dispersed from its mean value (average). A smaller standard deviation value indicates that the …

Standard deviation is a statistical measure of variability that indicates the average amount that a set of numbers deviates from their mean. The higher the standard deviation, the more spread out the …

Dec 26, 2025 · Standard Deviation is a statistical measure that describes how much variation or dispersion there is in a set of data points. It helps us understand how spread out the values in a …

Standard deviation (SD) is a measure of the amount of variation in a set of values. A low SD—close to zero—indicates that the values tend to be close to the mean of the set, while a high SD indicates that …

Aug 8, 2012 · also : a similar quantity found by dividing by one less than the number of squares in the sum of squares instead of taking the arithmetic mean.