condition mean min max ZT0-3 706.078211 706.078211 706.078211 ZT4-7 564.634585 564.634585 564.634585 ZT8-11 679.3474415000001 679.3474415000001 679.3474415000001 ZT12-15 782.7710695000001 782.7710695000001 782.7710695000001 ZT16-19 905.0454075 905.0454075 905.0454075 ZT20-23 576.9122555 576.9122555 576.9122555