condition mean min max ZT0-3 0.018603 0.01219495 0.02501105 ZT4-7 0.0 0.0 0.0 ZT8-11 0.01235025 0.01235025 0.01235025 ZT12-15 0 0 0 ZT16-19 0.01226015 0.01226015 0.01226015 ZT20-23 0.01229445 0.01229445 0.01229445