condition mean min max ZT0-3 24.6 24.6 24.6 ZT4-7 16.5 16.5 16.5 ZT8-11 33.9 33.9 33.9 ZT12-15 21.9 21.9 21.9 ZT16-19 29.349999999999998 29.349999999999998 29.349999999999998 ZT20-23 24.0 24.0 24.0