condition mean min max ZT0-3 24.386650000000003 22.9971 25.776200000000003 ZT4-7 17.81935 17.81935 17.81935 ZT8-11 9.55896 9.55896 9.55896 ZT12-15 0 0 0 ZT16-19 13.32365 13.32365 13.32365 ZT20-23 22.3557 22.3557 22.3557