| NIST/ITL StRD | |
| Dataset Name: BoxBOD (BoxBOD.dat) | |
| File Format: ASCII | |
| Starting Values (lines 41 to 42) | |
| Certified Values (lines 41 to 47) | |
| Data (lines 61 to 66) | |
| Procedure: Nonlinear Least Squares Regression | |
| Description: These data are described in detail in Box, Hunter and | |
| Hunter (1978). The response variable is biochemical | |
| oxygen demand (BOD) in mg/l, and the predictor | |
| variable is incubation time in days. | |
| Reference: Box, G. P., W. G. Hunter, and J. S. Hunter (1978). | |
| Statistics for Experimenters. | |
| New York, NY: Wiley, pp. 483-487. | |
| Data: 1 Response (y = biochemical oxygen demand) | |
| 1 Predictor (x = incubation time) | |
| 6 Observations | |
| Higher Level of Difficulty | |
| Observed Data | |
| Model: Exponential Class | |
| 2 Parameters (b1 and b2) | |
| y = b1*(1-exp[-b2*x]) + e | |
| Starting values Certified Values | |
| Start 1 Start 2 Parameter Standard Deviation | |
| b1 = 1 100 2.1380940889E+02 1.2354515176E+01 | |
| b2 = 1 0.75 5.4723748542E-01 1.0455993237E-01 | |
| Residual Sum of Squares: 1.1680088766E+03 | |
| Residual Standard Deviation: 1.7088072423E+01 | |
| Degrees of Freedom: 4 | |
| Number of Observations: 6 | |
| Data: y x | |
| 109 1 | |
| 149 2 | |
| 149 3 | |
| 191 5 | |
| 213 7 | |
| 224 10 |