condition mean min max ZT0-3 2030.3 2030.3 2030.3 ZT4-7 2268.4 2268.4 2268.4 ZT8-11 2210.25 2210.25 2210.25 ZT12-15 2323.8999999999996 2323.8999999999996 2323.8999999999996 ZT16-19 2312.5 2312.5 2312.5 ZT20-23 2188.6 2188.6 2188.6