What Is Sample Standard Deviation
Sample standard deviation is defined as follows;
S = Vs^2 meaning square root of S^2 or sample variance.
Sample standard deviation is the positive square root of the sample variance and it is the point estimate of the population standard deviation.
A look at the Essentials of business statistics, third edition, by Bruce L. Bowerman, Richard T, A O’connell, J.B Orris and Emily S. Murphree, will tell you more.