condition mean min max ZT0-3 69.728641 69.728641 69.728641 ZT4-7 86.745474 86.745474 86.745474 ZT8-11 95.53222600000001 95.53222600000001 95.53222600000001 ZT12-15 107.798962 107.798962 107.798962 ZT16-19 118.6114105 118.6114105 118.6114105 ZT20-23 131.5782125 131.5782125 131.5782125