condition mean min max ZT0-3 78.346478 78.346478 78.346478 ZT4-7 81.084126 81.084126 81.084126 ZT8-11 85.293228 85.293228 85.293228 ZT12-15 98.347483 98.347483 98.347483 ZT16-19 102.074243 102.074243 102.074243 ZT20-23 96.5510175 96.5510175 96.5510175