Question

What do you understand by standard deviation? also write the formula?

Answer 1

Standard deviation :-standard deviation is a measure of dispersion of a set of data from its mean . It is calculated as a square root of variance by determine the variation between each data point realtive to mean .....

Formula :-
a+h*(Sigma fiui / Sigma fi)

Answer 2

In statistics, the standard deviation (SD, also represented by the Greek letter sigma σ or the Latin letter s) is a measure that is used to quantify the amount of variation or dispersionof a set of data values. A low standard deviation indicates that the data points tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the data points are spread out over a wider range of values.