Fig. 4.
[Zn/Fe] abundance ratios determine in the sample of 27 RGB stars in 47 Tuc and plotted versus [Na/Fe], [Mg/Fe], and [K/Fe] ratios obtained in the same stars in Paper I. The color on the left and right sides of the symbols denote quality class of the spectral lines used to determined abundance ratios on the y and x axes, respectively (see Sect. 2.2). We also list the values of two-tailed probabilities, p, computed using Pearson’s parametric correlation coefficients (with and without abundance errors, p and pno_errors, respectively), as well as Spearman’s (pSpearman) and Kendall’s (pKendall) non-parametric rank-order correlation coefficients (see Sect. 3).
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