condition mean min max ZT0-3 158.001288 158.001288 158.001288 ZT4-7 171.8603245 171.8603245 171.8603245 ZT8-11 227.48262799999998 227.48262799999998 227.48262799999998 ZT12-15 288.4349665 288.4349665 288.4349665 ZT16-19 172.605139 172.605139 172.605139 ZT20-23 90.511905 90.511905 90.511905