condition mean min max ZT0-3 76.3791 68.45735 84.30085 ZT4-7 82.1328 82.1328 82.1328 ZT8-11 173.98250000000002 173.98250000000002 173.98250000000002 ZT12-15 0 0 0 ZT16-19 142.423 142.423 142.423 ZT20-23 67.2756 67.2756 67.2756