condition mean min max ZT0-3 275.078211 275.078211 275.078211 ZT4-7 308.9335955 308.9335955 308.9335955 ZT8-11 355.9874175 355.9874175 355.9874175 ZT12-15 384.5360535 384.5360535 384.5360535 ZT16-19 366.814923 366.814923 366.814923 ZT20-23 268.549888 268.549888 268.549888