Proof: Sum of Independent Standard Normals is Chi-Square - YouTube
Chi Square Distribution - PostNetwork Academy
Chi-squared distribution - Wikipedia
Chi-square distribution | Mean, variance, proofs, exercises
SOLVED: Let's find the expected value and the variance of the chi-square distribution using the moment- generating function: Let Y be random variable with the standard normal distribution: The moment generating function
Chi-square distribution | Mean, variance, proofs, exercises
Solved proof for distribution of (n-1)S^2/sigma^2 is the chi | Chegg.com
26.3 - Sampling Distribution of Sample Variance | STAT 414
self study - how to prove SST follows a chi-square distribution with (m−1) degrees of freedom - Cross Validated