condition mean min max ZT0-3 1.4618376149999999 0.6887472640000001 2.234927966 ZT4-7 2.57382965375 1.693890275 3.4537690325 ZT8-11 2.4556109045000003 2.1110842875 2.8001375215 ZT12-15 5.13272431675 2.851612283 7.4138363505000004 ZT16-19 7.27436535675 6.1325342979999995 8.4161964155 ZT20-23 10.539239422 10.476959195 10.601519649