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(4 Lectures Available)

S#	Lecture	Course	Institute	Discipline
1	Review and intuition why we divide by n-1 for the unbiased sample variance (K-A)	More on standard deviation (optional) (K-A)	Khan Academy	Basic and Health Sciences
2	Simulation providing evidence that (n-1) gives us unbiased estimate (K-A)	More on standard deviation (optional) (K-A)	Khan Academy	Basic and Health Sciences
3	Simulation showing bias in sample variance (K-A)	More on standard deviation (optional) (K-A)	Khan Academy	Basic and Health Sciences
4	Why we divide by n - 1 in variance (K-A)	More on standard deviation (optional) (K-A)	Khan Academy	Basic and Health Sciences