condition mean min max ZT0-3 9.866859999999999 9.866859999999999 9.866859999999999 ZT4-7 6.07444 6.07444 6.07444 ZT8-11 11.669550000000001 11.669550000000001 11.669550000000001 ZT12-15 12.62595 12.62595 12.62595 ZT16-19 13.8278 13.8278 13.8278 ZT20-23 10.288799999999998 10.288799999999998 10.288799999999998