condition mean min max ZT0-3 0.03135565 0.03135565 0.03135565 ZT4-7 0.02716785 0.02716785 0.02716785 ZT8-11 0.02594655 0.02594655 0.02594655 ZT12-15 0.0179686 0.0179686 0.0179686 ZT16-19 0.0118402 0.0118402 0.0118402 ZT20-23 0.00593345 0.00593345 0.00593345