What is the difference between simple linear model and loess model?

Can somebody explain to me the difference between linear model and loess model in statistics? I need to explain this to non-math people.

Answer

A VERY non-technical answer

A simple linear model fits a straight line through a set of points. The line is the best possible straight line (at least, for one sensible definition of best)

A loess model fits a complicated curve through a set of points. In some ways, it can be thought of as a complicated moving average. It is the best possible curve (at least, for one sensible definition of best)

Attribution
Source : Link , Question Author : mike , Answer Author : Peter Flom

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