condition mean min max ZT0-3 1802.5 1802.5 1802.5 ZT4-7 3440.5 3440.5 3440.5 ZT8-11 2874.0 2874.0 2874.0 ZT12-15 2720.2 2720.2 2720.2 ZT16-19 2120.75 2120.75 2120.75 ZT20-23 1960.5 1960.5 1960.5