condition mean min max ZT0-3 336.842943 336.842943 336.842943 ZT4-7 262.4201345 262.4201345 262.4201345 ZT8-11 292.56782 292.56782 292.56782 ZT12-15 389.1428005 389.1428005 389.1428005 ZT16-19 714.5357695 714.5357695 714.5357695 ZT20-23 1035.6747814999999 1035.6747814999999 1035.6747814999999