condition mean min max ZT0-3 0.24091475 0.2393265 0.242503 ZT4-7 0.736621 0.736621 0.736621 ZT8-11 0.493267 0.493267 0.493267 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.120317 0.120317 0.120317