Microworld: Best
Linear Fit: (All in One)
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Author:
Ravinder
Kumar
.This
Microworld develops tools for solving discrete models that depend upon proportionality.
Typically what happens in such models is that some parameters or their powers
are proportional to each other. The problem then reduces to determining a
suitable line y = kx that fits the (modified) data best so that the constant
k of proportionality can be determined. This can be done either manually,
as suggested in Giordano's book on mathematical modeling, or one can apply
the method of least squares. Regression lines do not help since a regression
line may turn out to be of the form y=mx+c where c is not zero. This book
lets the user find the constant of proportionality both manually as well as
using the method of least squares. Besides two built in examples of models,
there are three examples suggested to the user with enough hints. All examples
are taken from Giordano's book on Modeling Theory.
This
Microworld makes use of a Database as Active Data Object. This means that
you do not have to have a database program to use these data bases, but you
should have the MS Access Database or the MS Access 97 Database
installed as a Data Source Name. So be sure that your setup is ready
to use them.
In
Windows 95/98/ME, just go to the Control Panel, and under ODBC Data Sources,
select the User DSN tab. If MS Access Database or MS Access
97 Database is already installed, you are all set! Otherwise, press the
Add... button, and double-click on the Microsoft Access Driver (*.mdb)
entry. Then, in the Data Source Name, type MS Access Database.
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