condition mean min max ZT0-3 5119.799999999999 5119.799999999999 5119.799999999999 ZT4-7 5516.7 5516.7 5516.7 ZT8-11 6282.45 6282.45 6282.45 ZT12-15 6072.799999999999 6072.799999999999 6072.799999999999 ZT16-19 5571.85 5571.85 5571.85 ZT20-23 5203.35 5203.35 5203.35