Standard deviation is used in mathematics to describe how far from the mean the data points are spread.
What is a mean?
A mean can be defined as a ratio of the sum of the total number in a data set to the frequency of the data set.
In Mathematics, the median of a data set is generally considered by statistician or mathematician to be a better measure of center than the mean when there is an outlier in the data set, which typically makes the graphical representation to be skewed.
However, standard deviation is a terminology which is used in mathematics to describe how far from the mean the data points are spread.
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