condition mean min max ZT0-3 7.320094999999999 4.73856 12.1724 ZT4-7 5.47725 5.47725 5.47725 ZT8-11 3.56108 3.56108 3.56108 ZT12-15 9.8589 8.75749 10.96031 ZT16-19 5.644275 5.644275 5.644275 ZT20-23 5.184699999999999 5.184699999999999 5.184699999999999