condition mean min max ZT0-3 43.977205 43.977205 43.977205 ZT4-7 29.6252755 29.6252755 29.6252755 ZT8-11 46.032042000000004 46.032042000000004 46.032042000000004 ZT12-15 41.4836485 41.4836485 41.4836485 ZT16-19 84.5187145 84.5187145 84.5187145 ZT20-23 114.29595400000001 114.29595400000001 114.29595400000001