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NLS Page 		Nelson
Dataset
Additional Information
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
Model: log[y] = f(x;beta) + e = beta(1) - beta(2)x(1)exp[-beta(3)x(2)] + e

These data are the result of a study involving the analysis of performance degradation data from accelerated tests, published in IEEE Transactions on Reliability. The response variable is dialectric breakdown strength in kilo-volts, and the predictor variables are time in weeks and temperature in degrees Celcius.