condition mean min max ZT0-3 0.18964783333333332 0.15078350000000001 0.26723949999999996 ZT4-7 0.2595155 0.2595155 0.2595155 ZT8-11 0.5033745000000001 0.5033745000000001 0.5033745000000001 ZT12-15 0.43353325 0.3085375 0.5585289999999999 ZT16-19 0.16664630000000002 0.16664630000000002 0.16664630000000002 ZT20-23 0.28839349999999997 0.28839349999999997 0.28839349999999997