condition mean min max ZT0-3 0.392183 0.3796065 0.4079315 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.2120755 0.0 0.424151 ZT16-19 0.3779795 0.3779795 0.3779795 ZT20-23 1.674465 1.674465 1.674465