condition mean min max ZT0-3 3792.928434 3792.928434 3792.928434 ZT4-7 3397.4481324999997 3397.4481324999997 3397.4481324999997 ZT8-11 2893.0853155 2893.0853155 2893.0853155 ZT12-15 3003.131107 3003.131107 3003.131107 ZT16-19 3253.078211 3253.078211 3253.078211 ZT20-23 2864.6842085 2864.6842085 2864.6842085