condition mean min max ZT0-3 14.600000000000001 14.600000000000001 14.600000000000001 ZT4-7 13.0 13.0 13.0 ZT8-11 38.95 38.95 38.95 ZT12-15 18.099999999999998 18.099999999999998 18.099999999999998 ZT16-19 10.8 10.8 10.8 ZT20-23 18.9 18.9 18.9