condition mean min max ZT0-3 5.94435 5.94435 5.94435 ZT4-7 5.15045 5.15045 5.15045 ZT8-11 21.102510000000002 21.102510000000002 21.102510000000002 ZT12-15 69.9649 69.9649 69.9649 ZT16-19 47.429500000000004 47.429500000000004 47.429500000000004 ZT20-23 5.60445 5.60445 5.60445