Non-Linear Regression

This example validates the results for a non-linear regression by using the Weibull++ Equation Fit Solver tool.

Reference Case

The data set is from Table 13.1 on page 515 in the book Applied Linear Statistical Models by Kutner, Nachtsheim, Neter, and Li, McGraw-Hill, 2005.

Data

X	Y
2	54
5	50
7	45
10	37
14	35
19	25
26	20
31	16
34	18
38	13
45	8
52	11
53	8
60	4
65	6

Result

In the book, the exponential function is used. The estimated model parameters and the variances are = 58.6065, = 1.472, = -0.03959, = 0.00171

Results in Weibull++

The following picture shows the results in Weibull++: