condition mean min max ZT0-3 46.747687666666664 0.2312565 139.6635 ZT4-7 83.8086 83.8086 83.8086 ZT8-11 10.976715 10.976715 10.976715 ZT12-15 0.460763 0.340549 0.580977 ZT16-19 0.0 0.0 0.0 ZT20-23 0.231988 0.231988 0.231988