condition mean min max ZT0-3 0.08533450000000001 0.0 0.17066900000000002 ZT4-7 0.0840605 0.0840605 0.0840605 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0837345 0.0837345 0.0837345 ZT20-23 0.0 0.0 0.0