condition mean min max ZT0-3 14.36745 14.36745 14.36745 ZT4-7 12.49805 12.49805 12.49805 ZT8-11 12.137550000000001 12.137550000000001 12.137550000000001 ZT12-15 13.7042 13.7042 13.7042 ZT16-19 13.63215 13.63215 13.63215 ZT20-23 13.2198 13.2198 13.2198