condition mean min max ZT0-3 3.0141333975 2.417236224 3.611030571 ZT4-7 1.42306731725 1.4077218475 1.4384127869999999 ZT8-11 0.824728382 0.5259623065 1.1234944575 ZT12-15 0.289808788 0.2274976725 0.3521199035 ZT16-19 1.03834694025 0.6119718335000001 1.464722047 ZT20-23 2.916910513 2.568704189 3.265116837