condition mean min max ZT0-3 0.250466 0.194338 0.30659400000000003 ZT4-7 0.0777857 0.0777857 0.0777857 ZT8-11 4.282255 4.282255 4.282255 ZT12-15 0 0 0 ZT16-19 22.60495 22.60495 22.60495 ZT20-23 3.070125 3.070125 3.070125