condition mean min max ZT0-3 210.001288 210.001288 210.001288 ZT4-7 146.587156 146.587156 146.587156 ZT8-11 186.3578635 186.3578635 186.3578635 ZT12-15 203.2807665 203.2807665 203.2807665 ZT16-19 205.8869435 205.8869435 205.8869435 ZT20-23 229.719569 229.719569 229.719569