Question
Thu May 17, 2012 By:

what is the standard defination of physics ? also what is meant by mean absolute error?

Expert Reply
Thu May 17, 2012
(Physics / General Physics) the branch of science concerned with the properties of matter and energy and the relationships between them. It is based on mathematics and traditionally includes mechanics, optics, electricity and magnetism, acoustics, and heat. Modern physics, based on quantum theory, includes atomic, nuclear, particle, and solid-state studies. It can also embrace applied fields such as geophysics and meteorology
 

the mean absolute error (MAE) is a quantity used to measure how close forecasts or predictions are to the eventual outcomes. The mean absolute error is given by

As the name suggests, the mean absolute error is an average of the absolute errors , where  is the prediction and  the true value. Note that alternative formulations may include relative frequencies as weight factors.


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