Which "mean" to use and when? - Cross Validated
So we have arithmetic mean (AM), geometric mean (GM) and harmonic mean (HM). Their mathematical formulation is also well known along with their associated stereotypical …
Why is Standard Deviation preferred over Absolute Deviations …
Jan 7, 2025 · The mean is the number that minimizes the sum of squared deviations. Absolute mean deviation achieves point (1), and absolute median deviation achieves both points (1) …
"Difference of the means" vs "mean of differences"
Nov 4, 2024 · To put it very simply, you use the mean of differences, when there is a natural pairing between your 2 groups. eg you give people a new toothpaste to try out and you …
What is the significance of 1 SD? - Cross Validated
Nov 2, 2024 · What do you mean by "the derivative at 1 SD is +- 1"? Derivative of what? If you mean of a density plot, then what distribution? The normal? Different distributions will have …
How to calculate `mean` and `sd` of lognormal distribution based …
May 29, 2020 · Lognormal distribution as below: estimate meanlog 6.0515 sdlog 0.3703 How to calculate the mean and sd of this distribution?
mean - Difference between standard error and standard deviation
Nov 3, 2017 · I'm struggling to understand the difference between the standard error and the standard deviation. How are they different and why do you need to measure the standard ...
mean + 95 % confidence interval versus boxplots - Cross Validated
Feb 10, 2022 · Mean with 95% CI will give you almost the same, but the data must have a normal distribution and you don't get information about quartiles and outliers? Any advantages of …
Empirical relationship between mean, median and mode
The mean, the median, and the mode or maximum-ordinate are marked by bb, cc and aa, respectively, and as soon as the curves were drawn, a remarkable relation manifested itself …
mean - Is it correct to use plus or minus symbol before standard ...
Apr 21, 2015 · I have represented standard deviation as "±SD" before in publications. But I like to have opinions on this. Is it appropriate to use the notation '±' with SD ? Or ...
How does the expected value relate to mean, median, etc. in a non ...
Ok, so the question should technically be "how does the expected value relate to the mean, median etc. of data drawn randomly from a particular probability distribution?" I'm looking for …