sample variance divided by variance is Chi Square
28332
Proof of $\frac{(n-1)S^2}{\sigma^2} \sim \chi^2_{n-1}$
141861
What is meant by the variance of *functions* in *Introduction to Statistical Learning*?
69780
Understanding the Chi-squared test and the Chi-squared distribution
123850
Sample variance derivation
94136
Why is variance squared?
94712
Estimator of Variance of Error
95625
Variance of product of multiple independent random variables
103357
Estimate the population variance from a set of means
124392
Variance of a distribution's product with itself
32647
How to calculate the variance of a partition of variables
136419
Variance of the distribution of difference scores
66905
Variance of Binomial Distribution $E[X^2]$
10730
Proof that regression residual error is an unbiased estimate of error variance
81851
Testing equality of variances without the data, just from the variances and the mean
130631
Variance between two random points
154178
Performing a chi-square goodness of fit test
138529
Why is the standard deviation defined as sqrt of the variance and not as the sqrt of sum of squares over N?