condition mean min max ZT0-3 0.20966333333333334 0.0 0.62899 ZT4-7 0.388799 0.388799 0.388799 ZT8-11 0.0 0.0 0.0 ZT12-15 0.318254 0.0 0.636508 ZT16-19 0.187189 0.187189 0.187189 ZT20-23 0.0 0.0 0.0