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 …
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 - How do I calculate confidence intervals for a non-normal ...
You can just use a standard confidence interval for the mean: Bear in mind that when we calculate confidence intervals for the mean, we can appeal to the central limit theorem and use …
mean - "Weighted average" for medians - Cross Validated
Jan 14, 2021 · I have data that includes ~20 groups with descriptive stats of median, count, and mean for each of the groups. I know that the means are heavily skewed, and I don't have …
mean - "Averaging" variances - Cross Validated
May 6, 2017 · I need to obtain some sort of "average" among a list of variances, but have trouble coming up with a reasonable solution. There is an interesting discussion about the differences …
mean - How to explain 1.5 children? - Cross Validated
Oct 12, 2023 · This allows us to compare populations (e.g., how does the mean number of children in UK families compare to the mean number of children in German families), and to …
Does it ever make sense to average the median, mean, and mode?
Dec 16, 2020 · A has the lowest mean and the lowest mode, but the highest average right half of the scores B has the second-highest mean and the most normal distribution C has the most …
Calculate standard deviation from sample size, mean, and …
Jan 2, 2018 · If you are assuming a normal distribution then the formula for the endpoints of the confidence interval is strictly a function of the sample standard deviation. The other variables …
Difference in Means vs. Mean Difference - Cross Validated
Apr 29, 2015 · the distribution of the mean difference should be tighter then the distribution of the difference of means. See this with an easy example: mean in sample 1: 1 10 100 1000 mean …
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) …