seek data fitting program which gives confident interval

ychien@students.wisc.edu
Thu, 12 Jan 1995 23:39:26 -0600

To whom it may concern,

I am looking for a data fitting program which can handle four simultaneous
equations and gives confident interval (CI).

My data are x's vs y's. The model has four simultaneous equations. Each
simultaneous equations has variants in both denominator and numerator. I
want to, as you may already know, fit my data to the model. The problem is:

1) I can use Methametica. But it does not give CI.
2) I can use SASS (or SPSS). They give CI, but cannot handle four
simultaneous equations.

I wonder if anybody knows any data fitting program that can handle four
simultaneous equations and also gives CI? Preferably in Mac. Thanks.