condition mean min max ZT0-3 21.45 21.45 21.45 ZT4-7 28.3 28.3 28.3 ZT8-11 65.25 65.25 65.25 ZT12-15 28.349999999999998 28.349999999999998 28.349999999999998 ZT16-19 55.95 55.95 55.95 ZT20-23 25.85 25.85 25.85