condition mean min max ZT0-3 100.026939 100.026939 100.026939 ZT4-7 105.29511199999999 105.29511199999999 105.29511199999999 ZT8-11 112.0388995 112.0388995 112.0388995 ZT12-15 101.26748649999999 101.26748649999999 101.26748649999999 ZT16-19 99.077499 99.077499 99.077499 ZT20-23 83.332148 83.332148 83.332148