condition mean min max ZT0-3 51.8341 50.09195 53.6639 ZT4-7 37.162400000000005 37.162400000000005 37.162400000000005 ZT8-11 40.6477 40.6477 40.6477 ZT12-15 53.4179 52.8048 54.031 ZT16-19 49.3816 49.3816 49.3816 ZT20-23 47.7517 47.7517 47.7517