condition mean min max ZT0-3 42.11425 23.1789 52.484700000000004 ZT4-7 22.7398 22.7398 22.7398 ZT8-11 19.2974 19.2974 19.2974 ZT12-15 22.094925 21.22855 22.9613 ZT16-19 36.3942 36.3942 36.3942 ZT20-23 57.2479 57.2479 57.2479