can anyone tell me any shortcut method to calculate the mean deviation from mean ??

Question

jamesj · Answer

'mean deviation'?  Are you asking about the standard deviation?

aravindg · Answer

it seems the method i know is tedious

phi · Answer

http://mathworld.wolfram.com/MeanDeviation.html

aravindg · Answer

no mean deviation

aravindg · Answer

ya that is a long process

aravindg · Answer

i think there is a shortcut

aravindg · Answer

u see i got a shortcut for getting mean deviation about mean

jamesj · Answer

I don't know any shortcuts.  Ask Zarkon about this, as this is his area.

phi · Answer

if you know the distribution, there might be a short cut, but not in general

aravindg · Answer

ooh!

jamesj · Answer

yes, I think phi is exactly right.

aravindg · Answer

what about standard deviation?do any of u hav a good article on these topics mine is so complicated

aravindg · Answer

this topic of maths is so boring honestly

jamesj · Answer

I think there's no escaping it.  This is the thing about distributions.  You need nearly always more than one parameter.

aravindg · Answer

hmmm

jamesj · Answer

Yes, the calculations are tedious though, I agree.

jamesj · Answer

This was my least favorite topic in high school mathematics also.  Later on I realized stats was incredibly useful and powerful.  But I think at HS level, too much emphasis is placed on calculation and not enough on understanding concepts.

aravindg · Answer

hmm thx ..lemme get back to study