condition mean min max ZT0-3 9005.849999999999 9005.849999999999 9005.849999999999 ZT4-7 6558.7 6558.7 6558.7 ZT8-11 6826.35 6826.35 6826.35 ZT12-15 6569.549999999999 6569.549999999999 6569.549999999999 ZT16-19 6955.4 6955.4 6955.4 ZT20-23 8464.0 8464.0 8464.0