condition mean min max ZT0-3 0.233767215 0.16410015 0.30343428 ZT4-7 0.43413450475000004 0.3900504105 0.478218599 ZT8-11 0.52495150025 0.5236986745 0.526204326 ZT12-15 0.0519228085 0.023618171 0.080227446 ZT16-19 0.18204049625000002 0.1262775715 0.23780342100000001 ZT20-23 0.5447155865 0.470825871 0.618605302