condition mean min max ZT0-3 4.19267 3.614275 4.771065 ZT4-7 3.295085 3.295085 3.295085 ZT8-11 3.6219 3.6219 3.6219 ZT12-15 0 0 0 ZT16-19 4.908455 4.908455 4.908455 ZT20-23 3.57229 3.57229 3.57229