condition mean min max ZT0-3 29.85 29.85 29.85 ZT4-7 5.0 5.0 5.0 ZT8-11 26.65 26.65 26.65 ZT12-15 3.25 3.25 3.25 ZT16-19 10.649999999999999 10.649999999999999 10.649999999999999 ZT20-23 18.200000000000003 18.200000000000003 18.200000000000003