condition mean min max ZT0-3 123.572299 123.572299 123.572299 ZT4-7 126.30717250000001 126.30717250000001 126.30717250000001 ZT8-11 90.218085 90.218085 90.218085 ZT12-15 93.0249005 93.0249005 93.0249005 ZT16-19 50.265097 50.265097 50.265097 ZT20-23 36.323872 36.323872 36.323872