condition mean min max ZT0-3 81.90535101750001 63.97612946 99.83457257500001 ZT4-7 93.4164989025 88.111797705 98.7212001 ZT8-11 84.7343910975 83.11303727999999 86.355744915 ZT12-15 34.54999002 22.77597777 46.32400227 ZT16-19 21.5344265975 19.45594521 23.612907985 ZT20-23 10.569403998 5.313755841 15.825052155