condition mean min max ZT0-3 0.124749 0.124749 0.124749 ZT4-7 0.979452 0.979452 0.979452 ZT8-11 0.127999 0.127999 0.127999 ZT12-15 0.40092 0.40092 0.40092 ZT16-19 1.3293000104 1.3293000104 1.3293000104 ZT20-23 2.72728 2.72728 2.72728