CLASSWORK 3                                 9/19/2006       
                   ===========

1. Create your own library, ``MyLib'', of Fortran 77 routines. Let
   the first entry be a Fortran functions ggau_df.f and/or ggau_qdf.f, 
   which calculates the general Gaussian CDF and/or peaked CDF for 
   given expectation value A and standard deviation SIGMA. I.e., 
   Y=GGAU_DF(X,A,SIGMA), start then from gau_df.f of ForLib.

2. Use your Fortran function ggau_qdf.f to add exact curves for
   SIGMA=SQRT(TWO) and SIGMA=ONE/SQRT(TWO), A=ZERO in both cases,
   to the Gaussian plot of your September 19th homework. 

3. Create another routine for your own library: Generalize the 
   subroutine qdf_gnu.f from ForLib, so that one can restrict the 
   gnuplot range to intervals [XMIN,XMAX]. Call the new subroutine
   qdfrange_gnu.f.


4. Download the six formatted (readable) data files. Calculate
   for each data file the mean values and its errobar. Subsequently
   perform the Gaussian difference test for each pair of data
   sets. Which mean values are compatible with one another and
   which not? E-mail the results.