Question: In reality it is difficult if not impossible to know exactly how an outcome of interest relates to some characteristics that helps us describe it.

In reality it is difficult if not impossible to know exactly how an outcome of interest relates to some characteristics that helps us describe it. As a result we take a guess at this relationship and try to understand how useful this guess might be. Elaborate on functions in R that can help us make the guess of a functional form of a phenomena and writte a small function in R code that can be used to estimate the behavior of the functional form fitted to a data set (e.g. the root mean squared error).

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