condition mean min max ZT0-3 32.0 32.0 32.0 ZT4-7 28.6 28.6 28.6 ZT8-11 29.35 29.35 29.35 ZT12-15 15.25 15.25 15.25 ZT16-19 20.2 20.2 20.2 ZT20-23 13.549999999999999 13.549999999999999 13.549999999999999