Math Is Fun Forum

tina123

Member

Registered: 2012-04-29

Posts: 83

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 ?

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 25,002

Website

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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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.