condition mean min max ZT0-3 18.8816 18.8816 18.8816 ZT4-7 26.1199 26.1199 26.1199 ZT8-11 10.8104 10.8104 10.8104 ZT12-15 9.959835 9.959835 9.959835 ZT16-19 10.143305 10.143305 10.143305 ZT20-23 16.5096 16.5096 16.5096