condition mean min max ZT0-3 47.17775 47.17775 47.17775 ZT4-7 43.4271 43.4271 43.4271 ZT8-11 34.4499 34.4499 34.4499 ZT12-15 31.39775 31.39775 31.39775 ZT16-19 42.18185 42.18185 42.18185 ZT20-23 44.64005 44.64005 44.64005