Table 1
Comparison of the [Fe/H] of the different subsamples.
| Sample | Comparison | Planet hosts | K–S test | A–D test | α | α | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | σ | N | Mean | σ | D | p value | D | p value | Bin fitting | Bayesian fit | |
| pre-MS | 24 | 0.07 | 0.31 | 20 | −0.20 | 0.28 | 0.47 | 0.001 | 6.76 | 0.002 | −0.29 ± 0.13 | −1.40 ± 0.83 |
| MS | 15 | −0.11 | 0.26 | 13 | −0.05 | 0.25 | 0.26 | 0.610 | −0.21 | 0.456 | 0.50 ± 0.19 | 0.80 ± 0.60 |
| Giants | 38 | 0.00 | 0.11 | 21 | 0.07 | 0.15 | 0.31 | 0.121 | 2.31 | 0.040 | 1.64 ± 0.42 | 1.77 ± 0.85 |
Notes. For each subsample, we list the number of stars (N) as well as the mean and the standard deviation values of the [Fe/H] distribution. For the statistical tests, we provide the test statistic value, D, as well as the asymptotic p value. The A-D test critical values for significance levels of 5%, 2.5%, 1%, 0.5%, and 0.1% are 1.96, 2.72, 3.75, 4.59, and 6.55, respectively. Values of α, defined as in Eq. (2), are provided for the bin fitting as well as for the Bayesian fit.
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