condition mean min max ZT0-3 32.1 32.1 32.1 ZT4-7 26.1 26.1 26.1 ZT8-11 28.549999999999997 28.549999999999997 28.549999999999997 ZT12-15 7.25 7.25 7.25 ZT16-19 22.3 22.3 22.3 ZT20-23 27.45 27.45 27.45