condition mean min max ZT0-3 63.548049999999996 63.548049999999996 63.548049999999996 ZT4-7 51.60535 51.60535 51.60535 ZT8-11 54.714600000000004 54.714600000000004 54.714600000000004 ZT12-15 58.1625 58.1625 58.1625 ZT16-19 84.85965 84.85965 84.85965 ZT20-23 64.67345 64.67345 64.67345