condition mean min max ZT0-3 107.924264 107.924264 107.924264 ZT4-7 110.0678645 110.0678645 110.0678645 ZT8-11 151.690528 151.690528 151.690528 ZT12-15 143.7872125 143.7872125 143.7872125 ZT16-19 205.2823385 205.2823385 205.2823385 ZT20-23 139.38778150000002 139.38778150000002 139.38778150000002