condition mean min max ZT0-3 336.3805 336.3805 336.3805 ZT4-7 307.226 307.226 307.226 ZT8-11 310.774 310.774 310.774 ZT12-15 266.1525 266.1525 266.1525 ZT16-19 371.3655 371.3655 371.3655 ZT20-23 333.62149999999997 333.62149999999997 333.62149999999997