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
mean - Averaging variances - Cross Validated 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
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 the standard interval (using the critical points of the T-distribution), even if the underlying data is non-normal
Will the mean of a set of means always be the same as the mean obtained . . . 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 is always greater lesser than or equal to overall mean" are also invalid
Mean absolute deviation vs. standard deviation - Cross Validated After calculating the "sum of absolute deviations" or the "square root of the sum of squared deviations", you average them to get the "mean deviation" and the "standard deviation" respectively The mean deviation is rarely used