condition mean min max ZT0-3 25.3094 25.3094 25.3094 ZT4-7 44.1191 44.1191 44.1191 ZT8-11 26.6604 26.6604 26.6604 ZT12-15 22.88425 22.88425 22.88425 ZT16-19 11.70685 11.70685 11.70685 ZT20-23 15.8825 15.8825 15.8825