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