condition mean min max ZT0-3 603.696811 603.696811 603.696811 ZT4-7 519.235824 519.235824 519.235824 ZT8-11 533.262768 533.262768 533.262768 ZT12-15 567.246067 567.246067 567.246067 ZT16-19 360.6625745 360.6625745 360.6625745 ZT20-23 165.58048300000002 165.58048300000002 165.58048300000002