Question: Build a function in R, which: takes as input a data frame, and the two elements of a frame that you want to model Plot

Build a function in R,

which: takes as input a data frame, and the two elements of a frame that you want to model Plot the data fit with a smoothing spline with the default cross validation, vs the smoothing spline with 2 degrees of freedom (linear fit). Test the difference of fit using the F test Plot the normal quantile, quantile plots for the residuals

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