This function creates a P-P plot for a fitted Reliability Growth Analysis (RGA)
model. Currently only supports the Crow-AMSAA model. A P-P plot compares the
empirical cumulative distribution function (CDF) to the theoretical CDF specified
by the model. If the model fits well, the points should fall approximately along a straight line.
Usage
ppplot.rga(x, main = "P-P Plot", ...)
Value
A P-P plot comparing empirical and theoretical CDFs.