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 …
mean - "Averaging" variances - Cross Validated
May 6, 2017 · Context is everything here. Are these theoretical variances (moments of distributions), or sample variances? If they are sample variances, what is the relation between …
Finding the Mean and Variance from PDF - Cross Validated
Jan 15, 2015 · If $\theta=4$ how to you find the mean and variance? My guess was to plug in $4$ of course and then integrate that function from $0$ to infinity. As for the variance I honestly …
Mean absolute deviation vs. standard deviation - Cross Validated
Jan 13, 2014 · 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 …
Explaining Mean, Median, Mode in Layman's Terms
Mar 7, 2016 · Hence, the mean acts as the balancing point in a distribution. This visual allows an immediate understanding of the mean as it relates to the distribution of the data points. Other …
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 ...
mathematical statistics - Mean residual life - Cross Validated
12 If X is a nonnegative random variable representing the life of a component having distribution function F,the mean residual life is defined by
Finding mean when class sizes are unequal - Cross Validated
What will be the mean no. of days a student was absent? I am unable to understand since the class sizes are different. Update In both the first 2 answers, the authors have assumed …
hypothesis testing - Why does a confidence interval including 0 …
Could someone please explain why zero being inside or outside the confidence interval tells you whether or not the difference is significant?
What is the difference between Mean Squared Deviation and …
Oct 10, 2016 · I also guess that some people prefer using mean squared deviation as a name for variance because it is more descriptive -- you instantly know from the name what someone is …