condition mean min max ZT0-3 16.3666 12.694199999999999 20.039 ZT4-7 13.255315 13.255315 13.255315 ZT8-11 6.74686 6.74686 6.74686 ZT12-15 0 0 0 ZT16-19 9.773915 9.773915 9.773915 ZT20-23 13.19515 13.19515 13.19515