condition mean min max ZT0-3 210.39999999999998 210.39999999999998 210.39999999999998 ZT4-7 553.2 553.2 553.2 ZT8-11 424.34999999999997 424.34999999999997 424.34999999999997 ZT12-15 282.7 282.7 282.7 ZT16-19 151.25 151.25 151.25 ZT20-23 83.6 83.6 83.6