condition mean min max ZT0-3 0.01767555 0.0 0.0353511 ZT4-7 0.03485425 0.03485425 0.03485425 ZT8-11 0.0349745 0.0349745 0.0349745 ZT12-15 0 0 0 ZT16-19 0.0348565 0.0348565 0.0348565 ZT20-23 0.03481645 0.03481645 0.03481645