condition mean min max ZT0-3 93.2462152075 86.11774908 100.374681335 ZT4-7 72.569333475 69.32000692 75.81866002999999 ZT8-11 65.68526193166666 64.90211331666666 66.46841054666666 ZT12-15 62.958986159999995 61.121811779999994 64.79616054 ZT16-19 65.02652049166667 64.32090905666666 65.73213192666667 ZT20-23 64.26632781833334 61.91958851333333 66.61306712333334