Standard deviation Method
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In Statistics,standard deviation refers to the square root of the overall mean of the deviations of individual numbers or observations within a data set or observation from the its mean.
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Standard deviation is simply calculated by taking the mean of all the deviations of each individual number or observation in a distribution from mean/average of the distribution and then finding its square root.Standard deviation is one of the measures of the spread or dispersion of any observation or data set or how widely spread the data set or distribution is.It is the standard method that is used in various statistical research work and projects and is an universally recognized measure of data spread or dispersion.
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