98 lines
3.1 KiB
Plaintext
98 lines
3.1 KiB
Plaintext
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NIST/ITL StRD
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Dataset Name: Thurber (Thurber.dat)
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File Format: ASCII
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Starting Values (lines 41 to 47)
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Certified Values (lines 41 to 52)
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Data (lines 61 to 97)
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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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semiconductor electron mobility. The response
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variable is a measure of electron mobility, and the
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predictor variable is the natural log of the density.
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Reference: Thurber, R., NIST (197?).
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Semiconductor electron mobility modeling.
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Data: 1 Response Variable (y = electron mobility)
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1 Predictor Variable (x = log[density])
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37 Observations
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Higher Level of Difficulty
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Observed Data
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Model: Rational Class (cubic/cubic)
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7 Parameters (b1 to b7)
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y = (b1 + b2*x + b3*x**2 + b4*x**3) /
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(1 + b5*x + b6*x**2 + b7*x**3) + 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 = 1000 1300 1.2881396800E+03 4.6647963344E+00
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b2 = 1000 1500 1.4910792535E+03 3.9571156086E+01
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b3 = 400 500 5.8323836877E+02 2.8698696102E+01
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b4 = 40 75 7.5416644291E+01 5.5675370270E+00
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b5 = 0.7 1 9.6629502864E-01 3.1333340687E-02
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b6 = 0.3 0.4 3.9797285797E-01 1.4984928198E-02
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b7 = 0.03 0.05 4.9727297349E-02 6.5842344623E-03
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Residual Sum of Squares: 5.6427082397E+03
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Residual Standard Deviation: 1.3714600784E+01
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Degrees of Freedom: 30
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Number of Observations: 37
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Data: y x
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80.574E0 -3.067E0
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84.248E0 -2.981E0
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87.264E0 -2.921E0
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87.195E0 -2.912E0
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89.076E0 -2.840E0
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89.608E0 -2.797E0
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89.868E0 -2.702E0
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90.101E0 -2.699E0
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92.405E0 -2.633E0
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95.854E0 -2.481E0
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100.696E0 -2.363E0
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101.060E0 -2.322E0
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401.672E0 -1.501E0
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390.724E0 -1.460E0
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567.534E0 -1.274E0
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635.316E0 -1.212E0
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733.054E0 -1.100E0
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759.087E0 -1.046E0
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894.206E0 -0.915E0
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990.785E0 -0.714E0
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1090.109E0 -0.566E0
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1080.914E0 -0.545E0
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1122.643E0 -0.400E0
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1178.351E0 -0.309E0
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1260.531E0 -0.109E0
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1273.514E0 -0.103E0
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1288.339E0 0.010E0
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1327.543E0 0.119E0
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1353.863E0 0.377E0
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1414.509E0 0.790E0
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1425.208E0 0.963E0
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1421.384E0 1.006E0
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1442.962E0 1.115E0
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1464.350E0 1.572E0
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1468.705E0 1.841E0
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1447.894E0 2.047E0
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1457.628E0 2.200E0
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