condition mean min max ZT0-3 7.535914999999999 7.072934999999999 7.998895 ZT4-7 2.5652350000000004 2.5652350000000004 2.5652350000000004 ZT8-11 0.5672470000000001 0.5672470000000001 0.5672470000000001 ZT12-15 0 0 0 ZT16-19 1.45065 1.45065 1.45065 ZT20-23 3.08438 3.08438 3.08438