condition mean min max ZT0-3 32.678434 32.678434 32.678434 ZT4-7 48.974365 48.974365 48.974365 ZT8-11 71.8869265 71.8869265 71.8869265 ZT12-15 75.5723135 75.5723135 75.5723135 ZT16-19 99.8837965 99.8837965 99.8837965 ZT20-23 115.27331050000001 115.27331050000001 115.27331050000001