# mean absolute deviation

1. ### How do I find percentage from two values which are coming from two different population sets that has large difference in population sizes?

I need to find percentage from two values which are coming from two different population sets that has large difference in population sizes. They are also different in nature. I set is teachers and another set is students. I have the performance score of 10 schools. Each schools have filled...
2. ### Higher standard deviation than the mean

HI ! Excuse me for my english, my writing is not very good. I want to know what implies or what explains in an excercise when the standard deviation (STD=67) is higher than the mean (M=38), and the histogram behaves like an exponential distribution. Thanks by the way ! :tup: Regards from...
3. ### Normal distribution with Mean Absolute Deviation What percent lies within 1,2 AbsDev

Roughly 95% of the normal distribution lies within 2 standard deviations. However, recently I have begun using the mean absolute deviation a lot. What percent of the normal distribution is within 2 mean absolute deviations? Is this possible to calculate?