condition mean min max ZT0-3 825.946156 825.946156 825.946156 ZT4-7 665.8700739999999 665.8700739999999 665.8700739999999 ZT8-11 603.697862 603.697862 603.697862 ZT12-15 691.850398 691.850398 691.850398 ZT16-19 796.1352565 796.1352565 796.1352565 ZT20-23 757.4236785 757.4236785 757.4236785