condition mean min max ZT0-3 99.670298 99.670298 99.670298 ZT4-7 76.688787 76.688787 76.688787 ZT8-11 79.5733275 79.5733275 79.5733275 ZT12-15 84.629853 84.629853 84.629853 ZT16-19 129.50044300000002 129.50044300000002 129.50044300000002 ZT20-23 130.8194825 130.8194825 130.8194825