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 …
"Difference of the means" vs "mean of differences"
2024年11月5日 · The "mean of differences" is Namely, it is exactly the same as the "difference of means". And if they are mathematically exactly the same, then, when viewed as random …
How to interpret Mean Decrease in Accuracy and Mean Decrease …
2016年2月22日 · I'm having some difficulty understanding how to interpret variable importance output from the Random Forest package. Mean decrease in accuracy is usually described as …
Will the mean of a set of means always be the same as the mean …
2015年1月13日 · The above calculations also demonstrate that there is no general order between the mean of the means and the overall mean. In other words, the hypotheses "mean of means …
mean - Is it correct to use plus or minus symbol before standard ...
2015年4月21日 · 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 ...
mean - Is Median Absolute Percentage Error useless? - Cross …
2022年11月20日 · I'm working on a project focused on pricing houses. Looking online I see a lot of works and companies providing the performances of their model using the median instead …
What is implied by standard deviation being much larger than the …
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 …
spss - What is mean rank? - Cross Validated
2020年7月28日 · My question is - while using Mann Whitney test, we have two measures of central tendencies to pick - either mean rank or median: what is the logic here of picking mean …
mean - Can percentages be averaged? - Cross Validated
2015年3月30日 · The experimenter has taken the mean timing for each method, worked out the percentage improvement (e.g. Subject 1 took 10 seconds on average using Method A and 5 …
Which is better, replacement by mean and replacement by median?
2015年3月27日 · Replacement by mean or median --- or mode -- is in effect saying that you have no information on what a missing value might be. It is hard to know why imputation is though …