condition mean min max ZT0-3 1383.520388 1383.520388 1383.520388 ZT4-7 530.8001585 530.8001585 530.8001585 ZT8-11 614.832011 614.832011 614.832011 ZT12-15 905.6738849999999 905.6738849999999 905.6738849999999 ZT16-19 2112.7144415000002 2112.7144415000002 2112.7144415000002 ZT20-23 2960.227801 2960.227801 2960.227801