Question

why is standard deviation is considered to be the best measure of depression​

Answer 1

It is based on all values and thus, provides information about the complete series.

Brcause of these reason . Because of this reason, a change in even one value affects the value of standard deviation.

(ii) It is independent of origin but not of scale.

(iii) It is useful in advance statistical calculations like comparison of variability in two data sets.

(iv) It can be used in testing of hypothesis.

(v) It is capable of further algebraic treatment.