Oct 2, 2014 · 49 I used to teach statistics to a layman by jokes, and I found they learn a lot. Suppose for variance or standard deviation the following joke is quite useful: Joke Once two statistician of height …

I was wondering what the difference between the variance and the standard deviation is. If you calculate the two values, it is clear that you get the standard deviation out of the variance, but w...

One reserved observation is "-1" and so you have N-1 in computing the variance estimate. The unbiased estimate is called sample variance (not to be confused with the sample's variance) which is an argot; …

Jun 29, 2022 · Variance measures the amount of information in the data set. How? Mathematically, the variance is the measure of the variability in the data. So, how this can be explained as a measure of …

30 In population statistics, are variation and variance the same terms? If not, what is the difference between the two? I know that variance is the square of standard deviation. I also know that it is a …

Jan 26, 2020 · I wanna say this is due to the fact that the variance is squaring the difference between the mean and each sample, but what is the correct way of calculating variance for percentages?

Thanks. It is very helpful. Do you know roughly how this package works? Is the pooled variance based on the law of total variance? i.e. total variance decomposed to mean of variances and variance of …

Mar 1, 2025 · The question is: What do you do if the population variance σ2 σ 2 is unknown? Or rather, what do you tell students in intro statistics to do? As far as I can tell, the honest answer is: you …

I like these ideas too, but there's a less well known parallel definition of the variance (and thus the SD) that makes no reference to means as location parameters. The variance is half the mean square …

Dec 17, 2021 · A first difference between the pooled and combined variance formulas you have displayed is that the pooled variance formula given here contains what is known as a "degrees of …