Sample variance (dispersion)
s^2 - sample variance (dispersion)
x1, x2, x3 ... - sample values
m1, m2, m3 ... - frequencies of sample elements
x_v - sample mean (average)
n - number of sample elements
x1, x2, x3 ... - sample values
m1, m2, m3 ... - frequencies of sample elements
x_v - sample mean (average)
n - number of sample elements
Find
It is known that:
= 