condition mean min max ZT0-3 74.715276 74.715276 74.715276 ZT4-7 91.26458500000001 91.26458500000001 91.26458500000001 ZT8-11 93.2263785 93.2263785 93.2263785 ZT12-15 90.1691165 90.1691165 90.1691165 ZT16-19 99.4077735 99.4077735 99.4077735 ZT20-23 116.8362595 116.8362595 116.8362595