condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.2337385 0.2337385 0.2337385 ZT8-11 0.1178745 0.1178745 0.1178745 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0222928 0.0222928 0.0222928 ZT20-23 0.0 0.0 0.0