condition mean min max ZT0-3 76.7648926575 69.26767153 84.262113785 ZT4-7 93.13747998166667 55.42610608 130.84885388333333 ZT8-11 83.61148585833334 72.35739485666667 94.86557686 ZT12-15 47.35792257 44.462943360000004 50.25290178 ZT16-19 51.05676197 47.59920125333333 54.51432268666667 ZT20-23 54.03232468666667 50.28241512333334 57.78223425