condition mean min max ZT0-3 377.407044 377.407044 377.407044 ZT4-7 440.34839750000003 440.34839750000003 440.34839750000003 ZT8-11 528.83172 528.83172 528.83172 ZT12-15 391.0963605 391.0963605 391.0963605 ZT16-19 529.776813 529.776813 529.776813 ZT20-23 418.70023 418.70023 418.70023