condition mean min max ZT0-3 10.715599999999998 10.715599999999998 10.715599999999998 ZT4-7 8.04697 8.04697 8.04697 ZT8-11 9.378565 9.378565 9.378565 ZT12-15 11.05095 11.05095 11.05095 ZT16-19 14.63245 14.63245 14.63245 ZT20-23 11.323049999999999 11.323049999999999 11.323049999999999