Fitting Non-linear equations

["Sam Kamau" <skamau@acc.or.ke>]

Dear Users,

 

I am new to this group but I would like you to help me with a problem

 

First I would like to know how to measure goodness of fit for non linear equations. The output I am getting are the t-values of the parameters estimated.

 

Secondly, how do you plot the resultant equation to a scatter plot with data used in estimating the equations

 

Thank you

 

Samuel Kamau