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 examples (e.g., Harmonic mea...
Why is Standard Deviation preferred over Absolute Deviations from the …
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) and (3).
When is the median-of-means estimator better than the standard mean?
May 22, 2023 · The issue for heavy-tailed distributions is that the "large" threshold for the number of samples depends arbitrarily badly on the tail, whereas better estimators make the "large" threshold …
What is implied by standard deviation being much larger than the mean?
What does it imply for standard deviation being more than twice the mean? Our data is timing data from event durations and so strictly positive. (Sometimes very small negatives show up due to clock
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 among the three
Understanding semi supervised technique called mean teachers
I am trying to understand applying semi supervised learning as described in this paper. Describing the final recipe as described in this paper: Take a supervised architecture and make a copy of it...
Is mean ever less than the median? - Cross Validated
Sep 24, 2015 · The mean would be less than the median if the distribution is negatively skewed. In other words, the mean is less than the median when the distribution of scores is not symmetrical and there …
terminology - What does 'Parent Distribution' mean in statistics ...
Aug 11, 2022 · Two independent parameters, the mean $\mu_ {\text {parent}}$, and a standard deviation, $\sigma_ {\text {parent}}$, characterise the parent distribution. In practice when we take a …
Use cross validation to select ridge regression parameter $k$: What if ...
Jan 30, 2025 · In terms of cross validation, this answer, with its reference to The Elements of Statistical Learning, implies that standard practice is to re-center the predictors within the training set of each …
How to calculate `mean` and `sd` of lognormal distribution based on ...
May 29, 2020 · Lognormal distribution as below: estimate meanlog 6.0515 sdlog 0.3703 How to calculate the mean and sd of this distribution?