condition mean min max ZT0-3 7.597252500000001 7.32718 7.867325000000001 ZT4-7 4.15454 4.15454 4.15454 ZT8-11 3.7139300000000004 3.7139300000000004 3.7139300000000004 ZT12-15 0 0 0 ZT16-19 5.708114999999999 5.708114999999999 5.708114999999999 ZT20-23 5.835559999999999 5.835559999999999 5.835559999999999