condition mean min max ZT0-3 33.63965 28.60575 38.67355 ZT4-7 28.61385 28.61385 28.61385 ZT8-11 20.582 20.582 20.582 ZT12-15 0 0 0 ZT16-19 58.49815 58.49815 58.49815 ZT20-23 44.618449999999996 44.618449999999996 44.618449999999996