condition mean min max ZT0-3 653.252422 653.252422 653.252422 ZT4-7 573.6541935 573.6541935 573.6541935 ZT8-11 570.795437 570.795437 570.795437 ZT12-15 602.895486 602.895486 602.895486 ZT16-19 558.7940615 558.7940615 558.7940615 ZT20-23 613.4506974999999 613.4506974999999 613.4506974999999