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Table 3

Statistical tests resulting from the fitting of the elements with Z 30.

Linear Hyperbolic Two-segmented line Statistical model comparison

Element σ [X / Fe] df* σ [X / Fe] σ [X / Fe] F Lin−Hyp P Lin−Hyp F Lin−2SL P Lin−2SL
[dex] [dex] [dex]

C 0.033 4.86 39 0.033 5.04 0.37
O 0.028 5.19 39 0.028 5.37 0.27
Na 0.030 12.46 39 0.033 1.89 0.028 1.98 218.94 1.11-16 106.20 4.44-16
Mg 0.011 1.04 39 0.011 0.91 6.22 1.71-2
Al 0.017 2.56 39 0.015 2.61 0.21
Si 0.010 1.60 39 0.010 1.16 0.009 1.14 15.8 3.03-4 8.54 8.95-4
S 0.020 1.51 38 0.021 1.40 0.020 1.33 3.97 5.36-2 3.33 4.70-2
Ca 0.009 2.23 39 0.009 1.28 0.008 1.34 30.01 2.89-6 14.19 2.66-5
Sc 0.021 2.67 23 0.021 1.20 0.019 1.33 29.19 2.00-5 13.37 1.80-4
Ti 0.012 2.13 39 0.012 2.21 0.40
V 0.014 1.92 23 0.011 0.85 0.011 0.82 29.84 1.73-5 15.12 8.56-5
Cr 0.006 1.03 39 0.006 0.96 0.006 0.93 3.57 6.64-2 2.87 6.94-2
Mn 0.019 4.14 23 0.019 2.26 0.020 2.71 20.17 1.82-4 8.08 2.50-3
Co 0.021 4.39 23 0.020 0.96 0.020 1.06 83.68 5.95-9 39.36 7.87-8
Ni 0.018 7.51 39 0.019 1.61 0.017 1.77 143.85 1.73-14 68.77 3.44-13
Cu 0.019 1.62 23 0.017 1.21 0.013 1.05 8.94 6.74-3 6.03 8.53-3
Zn 0.019 2.34 39 0.018 1.80 0.019 1.55 12.70 1.01-3 9.17 5.88-4

Notes.

(*)

The degrees of freedom (df) are listed only for the linear fitting (two parameters). Those related to the hyperbolic (three parameters) and two-segmented line (four parameters) fitting are immediately deducible.

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