condition mean min max ZT0-3 53.4643 51.81 55.1186 ZT4-7 62.2543 62.2543 62.2543 ZT8-11 57.62795 57.62795 57.62795 ZT12-15 0 0 0 ZT16-19 68.39725 68.39725 68.39725 ZT20-23 72.88605 72.88605 72.88605