condition mean min max ZT0-3 0.23191499999999998 0.207431 0.256399 ZT4-7 0.45765500000000003 0.45765500000000003 0.45765500000000003 ZT8-11 0.5474215 0.5474215 0.5474215 ZT12-15 0 0 0 ZT16-19 0.34162499999999996 0.34162499999999996 0.34162499999999996 ZT20-23 0.16110249999999998 0.16110249999999998 0.16110249999999998