| NIST/ITL StRD | |
| Dataset Name: Chwirut2 (Chwirut2.dat) | |
| File Format: ASCII | |
| Starting Values (lines 41 to 43) | |
| Certified Values (lines 41 to 48) | |
| Data (lines 61 to 114) | |
| Procedure: Nonlinear Least Squares Regression | |
| Description: These data are the result of a NIST study involving | |
| ultrasonic calibration. The response variable is | |
| ultrasonic response, and the predictor variable is | |
| metal distance. | |
| Reference: Chwirut, D., NIST (197?). | |
| Ultrasonic Reference Block Study. | |
| Data: 1 Response (y = ultrasonic response) | |
| 1 Predictor (x = metal distance) | |
| 54 Observations | |
| Lower Level of Difficulty | |
| Observed Data | |
| Model: Exponential Class | |
| 3 Parameters (b1 to b3) | |
| y = exp(-b1*x)/(b2+b3*x) + e | |
| Starting values Certified Values | |
| Start 1 Start 2 Parameter Standard Deviation | |
| b1 = 0.1 0.15 1.6657666537E-01 3.8303286810E-02 | |
| b2 = 0.01 0.008 5.1653291286E-03 6.6621605126E-04 | |
| b3 = 0.02 0.010 1.2150007096E-02 1.5304234767E-03 | |
| Residual Sum of Squares: 5.1304802941E+02 | |
| Residual Standard Deviation: 3.1717133040E+00 | |
| Degrees of Freedom: 51 | |
| Number of Observations: 54 | |
| Data: y x | |
| 92.9000E0 0.500E0 | |
| 57.1000E0 1.000E0 | |
| 31.0500E0 1.750E0 | |
| 11.5875E0 3.750E0 | |
| 8.0250E0 5.750E0 | |
| 63.6000E0 0.875E0 | |
| 21.4000E0 2.250E0 | |
| 14.2500E0 3.250E0 | |
| 8.4750E0 5.250E0 | |
| 63.8000E0 0.750E0 | |
| 26.8000E0 1.750E0 | |
| 16.4625E0 2.750E0 | |
| 7.1250E0 4.750E0 | |
| 67.3000E0 0.625E0 | |
| 41.0000E0 1.250E0 | |
| 21.1500E0 2.250E0 | |
| 8.1750E0 4.250E0 | |
| 81.5000E0 .500E0 | |
| 13.1200E0 3.000E0 | |
| 59.9000E0 .750E0 | |
| 14.6200E0 3.000E0 | |
| 32.9000E0 1.500E0 | |
| 5.4400E0 6.000E0 | |
| 12.5600E0 3.000E0 | |
| 5.4400E0 6.000E0 | |
| 32.0000E0 1.500E0 | |
| 13.9500E0 3.000E0 | |
| 75.8000E0 .500E0 | |
| 20.0000E0 2.000E0 | |
| 10.4200E0 4.000E0 | |
| 59.5000E0 .750E0 | |
| 21.6700E0 2.000E0 | |
| 8.5500E0 5.000E0 | |
| 62.0000E0 .750E0 | |
| 20.2000E0 2.250E0 | |
| 7.7600E0 3.750E0 | |
| 3.7500E0 5.750E0 | |
| 11.8100E0 3.000E0 | |
| 54.7000E0 .750E0 | |
| 23.7000E0 2.500E0 | |
| 11.5500E0 4.000E0 | |
| 61.3000E0 .750E0 | |
| 17.7000E0 2.500E0 | |
| 8.7400E0 4.000E0 | |
| 59.2000E0 .750E0 | |
| 16.3000E0 2.500E0 | |
| 8.6200E0 4.000E0 | |
| 81.0000E0 .500E0 | |
| 4.8700E0 6.000E0 | |
| 14.6200E0 3.000E0 | |
| 81.7000E0 .500E0 | |
| 17.1700E0 2.750E0 | |
| 81.3000E0 .500E0 | |
| 28.9000E0 1.750E0 |