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What's the deal with the n-1 in the sample variance in statistics? To make sense of it, we'll turn to... right triangles and the ...

Calculation of the sample mean's variance for finite populations.

This is NOT a proof of Bessel's correction. Instead, we explore several ideas to help you understand why the "n-1" makes sense.

https://www.tilestats.com 1. The sample variance (1:00) 2. Sample variance vs population variance (02:40) 3. Unbiased vs biased ...

In this video, we begin to make inferences about variances. To begin I offer several short, real-world scenarios where variance ...

This video is part of an online module for my course Basic Econometric at University of Gothenburg, Sweden.

Unizor - Creative Minds through Art of Mathematics - Math4Teens Notes to a video lecture on http://www.unizor.com Bernoulli ...

This statistics video tutorial provides a basic introduction into the central limit theorem. It explains that a sampling distribution of ...

A video explaining how to calculate and interpret the variance and standard deviation. This video is suitable for both AS Level ...

Why do we divide by (N-1) and not N in the unbiased variance? This video is the full mathematical reason for that. No hand wavy ...

In this video the proof of the Bessel Correction for Sample Variance Bias is shown, i.e. the difference between the Sample ...

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First chunk of time, I am explaining the formulas and calculating by hand. Last 5 minutes, I show you how to calculate with the help ...

Since sampling error is involved, the sample variances fall over a range in the chi-square distribution. The sample will most likely ...

NOTE: At minute 11:48, I forgot to write the "squared" above X-bar. Later, at minute 28:26, when I summarize everything I found ...

https://www.patreon.com/ProfessorLeonard Statistics Lecture 7.5: Finding Confidence Intervals Involving Variance and Standard ...

Correction: At 30:42 I write "X = Y". They're not equal, what I meant to say is "X and Y are identically distributed". The variance is a ...

The F-Test Two-Sample for Variances tool tests the null hypothesis that two samples come from two independent populations ...

In this video, we solve problem 3.2.8 from Essentials of Statistics, 6th edition, by Triola. We're asked to compute the range, sample ...