This function evaluates the integrated squared error between a density
estimate constructed from a standardised version of the univariate data
y and a standard normal density function.
a vector of data.
further arguments which are to be passed to
y are first standardised to have sample mean 0 and sample
variance 1. The integrated squared error between a density estimate
constructed from these standardised data and a standard normal distribution
is then evaluated.
See Section 2.5 of the reference below.
the integrated squared error.
Bowman, A.W. and Azzalini, A. (1997). Applied Smoothing Techniques for Data Analysis: the Kernel Approach with S-Plus Illustrations. Oxford University Press, Oxford.