condition mean min max ZT0-3 0.2862693333333333 0.0 0.71273 ZT4-7 0.573223 0.573223 0.573223 ZT8-11 0.146394 0.146394 0.146394 ZT12-15 0.0 0.0 0.0 ZT16-19 0.278698 0.278698 0.278698 ZT20-23 0.0 0.0 0.0