condition mean min max ZT0-3 299.07653 299.07653 299.07653 ZT4-7 282.611089 282.611089 282.611089 ZT8-11 316.997951 316.997951 316.997951 ZT12-15 222.44685800000002 222.44685800000002 222.44685800000002 ZT16-19 297.20776950000004 297.20776950000004 297.20776950000004 ZT20-23 319.617007 319.617007 319.617007