condition mean min max ZT0-3 36.9093 36.9093 36.9093 ZT4-7 32.1984 32.1984 32.1984 ZT8-11 38.025850000000005 38.025850000000005 38.025850000000005 ZT12-15 35.08905 35.08905 35.08905 ZT16-19 38.021 38.021 38.021 ZT20-23 30.148850000000003 30.148850000000003 30.148850000000003