condition mean min max ZT0-3 860.233995 860.233995 860.233995 ZT4-7 243.848942 243.848942 243.848942 ZT8-11 419.058564 419.058564 419.058564 ZT12-15 395.69581300000004 395.69581300000004 395.69581300000004 ZT16-19 940.742706 940.742706 940.742706 ZT20-23 983.612764 983.612764 983.612764