condition mean min max ZT0-3 89.607801 89.607801 89.607801 ZT4-7 96.1412755 96.1412755 96.1412755 ZT8-11 129.32826699999998 129.32826699999998 129.32826699999998 ZT12-15 111.5861465 111.5861465 111.5861465 ZT16-19 92.692835 92.692835 92.692835 ZT20-23 70.599907 70.599907 70.599907