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Table 1

Statistical values (mean, standard deviation, median, and median absolute deviation) for the activity level log    (LX/Lbol) of young stars in the Orion nebula cluster, IC 348, and NGC 2547.

Stat. value Orion IC 348 NGC 2547

Mean  − 3.39  −3.53  −3.20
Std. Dev. 0.63 0.43 0.24
Median  − 3.31  −3.53  −3.23
MAD 0.39 0.21 0.18

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