condition mean min max ZT0-3 65.04331124500001 62.222222020000004 67.86440047 ZT4-7 83.13378194 81.89648081333333 84.37108306666667 ZT8-11 78.49161026499999 77.57529972 79.40792081 ZT12-15 79.52248517999999 75.92335535666666 83.12161500333333 ZT16-19 81.79737174333334 80.21102057666667 83.38372291 ZT20-23 74.57828966 70.74853052 78.4080488