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   Exponential Class Model
Dataset
Name:
Nelson

Procedure: Nonlinear Least Squares Regression
Certification Method & Definitions

Data: 1 Response Variable (y)
2 Predictor Variables (x1 and x2)
128 Observations
Average Level of Difficulty
Observed Data
Data file (ASCII Format)
Additional Information

Model: Exponential Class
3 Parameters (beta(1) to beta(3) to beta(1) to beta(3))
Starting Values

log[y] = f(x;beta) + e = beta(1) - beta(2)x(1)exp[-beta(3)x(2)] + e

Results: Certified Values
Graphics

Reference: Nelson, W. (1981).
Analysis of Performance-Degradation Data.
IEEE Transactions on Reliability.
Vol. 2, R-30, No. 2, pp. 149-155.