condition mean min max ZT0-3 57.854281 57.854281 57.854281 ZT4-7 40.970065000000005 40.970065000000005 40.970065000000005 ZT8-11 41.971632 41.971632 41.971632 ZT12-15 48.4318145 48.4318145 48.4318145 ZT16-19 44.908368 44.908368 44.908368 ZT20-23 49.653343 49.653343 49.653343