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