condition mean min max ZT0-3 0.012923483333333333 0.0 0.03877045 ZT4-7 0.0365933 0.0365933 0.0365933 ZT8-11 0.0 0.0 0.0 ZT12-15 0.018538675 0.0 0.03707735 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0