condition mean min max ZT0-3 5.2373200285 4.211300859 6.263339198000001 ZT4-7 6.961835600500001 6.794808997500001 7.128862203500001 ZT8-11 10.71665033025 8.294228255499998 13.139072405 ZT12-15 9.0753143365 7.5981445655 10.5524841075 ZT16-19 8.711447987749999 7.313231818 10.1096641575 ZT20-23 11.826051055 10.812102885 12.839999225