condition mean min max ZT0-3 207.54999999999998 207.54999999999998 207.54999999999998 ZT4-7 129.8 129.8 129.8 ZT8-11 157.39999999999998 157.39999999999998 157.39999999999998 ZT12-15 161.35 161.35 161.35 ZT16-19 231.4 231.4 231.4 ZT20-23 217.05 217.05 217.05