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## #1 2012-09-14 00:57:12

tina123
Full Member

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### physical meaning of mean ?

What is the physical meaning of mean value ?
using this formula .

mean = (f * m) / n

where f is the frequency of each class and m is the mid point of each class
n is sum of frequecy

What is the physical meaning of mean using above formula ?

## #2 2012-09-16 15:20:09

Agnishom
Real Member

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### Re: physical meaning of mean ?

Mean can give you value around which the other values of the class are equally distributed.
You can know, what you are choosing is neither more nor less

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
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## #3 2012-09-16 18:45:52

zetafunc.
Guest

### Re: physical meaning of mean ?

It is a formula which can give you an approximation of the mean (as you're only using mid-points of class intervals for which presumably you don't know how the exact distribution of). As for a physical meaning, it has applications in mechanics too -- you can apply a variation of that formula to find the centre of mass of a system.