condition mean min max ZT0-3 3.8980750000000004 3.5199800000000003 4.2761700000000005 ZT4-7 5.15961 5.15961 5.15961 ZT8-11 2.899625 2.899625 2.899625 ZT12-15 0 0 0 ZT16-19 4.3916249999999994 4.3916249999999994 4.3916249999999994 ZT20-23 4.913690000000001 4.913690000000001 4.913690000000001