condition mean min max ZT0-3 202.82853 202.82853 202.82853 ZT4-7 177.1179255 177.1179255 177.1179255 ZT8-11 125.006248 125.006248 125.006248 ZT12-15 329.18064649999997 329.18064649999997 329.18064649999997 ZT16-19 156.6900755 156.6900755 156.6900755 ZT20-23 136.73877 136.73877 136.73877