Copyright ©  K.J. Beath 1994-5. All rights reserved.
Portions copyright © Symantec Corporation
This software was created using the THINK Class Library.
Portions of this software were created using EXTENDER GrafPak™ by Invention Software.
Uses the Infinity Windoid WDEF by Troy Gaul © 1991-95 Infinity Systems.
Solution of least squares problem using LINPACK routines sqrdc and sqrls recoded in PASCAL.
Preferences files were implemented using Object Classes from Peter Broadribb  and Jamie McCarthy. (Thanks)
There are many books and papers that I looked at to deal with the numerical aspects of programming, some of these are (and I am most thankful for their ideas or clarification):
'Statistical Models in S' edited by J.M. Chambers and T.J.Hastie, Wadsworth & Brooks/Cole (1992).
'Elements of Statistical Computing' by R.A. Thisted, Chapman and Hall (1988).
'Statistical Computation' by J.H. Maindonald, Wiley (1984).
'A Study of the Accuracy of Some Approximations to t, chi-square and F Tail Probabilities' by R.F. Ling, JASA, 73, 274-283 (1978).
'Handbook of Mathematical Functions' edited by M. Abramowitz and I.A. Stegun, National Bureau of  Standards (1964).
'Numerical Methods and Software' by D. Kahaner, C. Moler and S. Nash, Prentice-Hall (1989)
'LINPACK Users' Guide' by J.J Dongarra, C.B. Moler, J.R. Bunch and G.W.Stewart, SIAM(1979)
'Solving least Squares Problems' by C.L. Lawson and R. J. Hanson, Prentice-Hall (1974)