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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. The standard deviation of a random variable, sample, statistical population, data set, or probability distribution is the square root of its variance.
Deviation just means how far from the normal. The standard deviation is a measure of how spreadout numbers are. In national 5 lifeskills maths standard deviation is a measure of consistency or spread of data. It is used as a comparison between different data sets. This free standard deviation calculator computes the standard deviation, variance, mean, sum, and error margin of a given data set.
This free standard deviation calculator computes the standard deviation, variance, mean, sum, and error margin of a given data set.
