condition mean min max ZT0-3 50.15245 50.15245 50.15245 ZT4-7 38.7919 38.7919 38.7919 ZT8-11 37.07815 37.07815 37.07815 ZT12-15 40.995850000000004 40.995850000000004 40.995850000000004 ZT16-19 55.70465 55.70465 55.70465 ZT20-23 53.581050000000005 53.581050000000005 53.581050000000005