condition mean min max ZT0-3 0.007776 0.0 0.015552 ZT4-7 0.06244345 0.06244345 0.06244345 ZT8-11 0.0158523 0.0158523 0.0158523 ZT12-15 0 0 0 ZT16-19 0.0152946 0.0152946 0.0152946 ZT20-23 0.01546665 0.01546665 0.01546665