condition mean min max ZT0-3 41.304375 37.96395 44.644800000000004 ZT4-7 39.51625 39.51625 39.51625 ZT8-11 35.8365 35.8365 35.8365 ZT12-15 0 0 0 ZT16-19 57.4934 57.4934 57.4934 ZT20-23 63.421800000000005 63.421800000000005 63.421800000000005