condition mean min max ZT0-3 4.2985025 4.255145 4.3418600000000005 ZT4-7 4.329745 4.329745 4.329745 ZT8-11 4.386015 4.386015 4.386015 ZT12-15 0 0 0 ZT16-19 4.96281 4.96281 4.96281 ZT20-23 4.54358 4.54358 4.54358