condition mean min max ZT0-3 5.1765574999999995 4.461025 5.89209 ZT4-7 3.38155 3.38155 3.38155 ZT8-11 3.5633250000000003 3.5633250000000003 3.5633250000000003 ZT12-15 0 0 0 ZT16-19 4.04879 4.04879 4.04879 ZT20-23 3.9009400000000003 3.9009400000000003 3.9009400000000003