condition mean min max ZT0-3 26.2673 26.2673 26.2673 ZT4-7 23.48535 23.48535 23.48535 ZT8-11 20.164 20.164 20.164 ZT12-15 21.27835 21.27835 21.27835 ZT16-19 22.7827 22.7827 22.7827 ZT20-23 24.8427 24.8427 24.8427