condition mean min max ZT0-3 132.54545 132.54545 132.54545 ZT4-7 133.29241 133.29241 133.29241 ZT8-11 133.6127405 133.6127405 133.6127405 ZT12-15 134.8224455 134.8224455 134.8224455 ZT16-19 184.1811955 184.1811955 184.1811955 ZT20-23 175.5540555 175.5540555 175.5540555