condition mean min max ZT0-3 0.43565925 0.3179685 0.55335 ZT4-7 0.283346 0.283346 0.283346 ZT8-11 0.24899300000000002 0.24899300000000002 0.24899300000000002 ZT12-15 0 0 0 ZT16-19 0.3373105 0.3373105 0.3373105 ZT20-23 0.614317 0.614317 0.614317