Why does the standard deviation square numbers?
21521
Motivation behind standard deviation?
70999
Why does this excerpt say that unbiased estimation of standard deviation usually isn't relevant?
146616
Why is the squared difference so commonly used?
96914
What does the size of the standard deviation mean?
19625
Difference between standard error and standard deviation
43277
Confused by (apparent) inconsistent precision
32512
lognormal distribution, standard-deviation and (physical) units
79930
Standard deviation of revenue where numbers are only positive
30431
How is the notation $X\sim N(\mu,\sigma^2)$ read?
157069
sum of double precision gives weird results
33622
Detecting outliers using standard deviations
56037
Arithmetic mean. Why does it work?
31907
Why does N[1.000 01, 10] return 1.00001, but N[1.000 001, 10] returns only 1.?
139959
Why do some statistics symbols have a "squared", e.g. Variance $\sigma^2$, "R squared" $R^2$ or heritability $H^2$
81308
What is the reasoning behind standardization (dividing by standard deviation)?
36606
Why the standard deviation of the sample mean is calculated as $\frac{\sigma}{\sqrt{n}}$?
99504
Why is chi square used when creating a confidence interval for the variance?