Fig. 6.
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Statistical significance of diversity in [Zn/Fe]fit within DLAs using the z-test: 
, where we choose the reference component [Zn/Fe]fit, ref to be the one with the minimum uncertainty on its depletion. Here, the linear fits to the depletion patterns exclude the α-elements and Mn (NAM). QSO 0013−004 has an additional point at sigma ∼55, which is not shown here for clarity.
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