condition mean min max ZT0-3 74.36167255166666 70.17258881333333 78.55075629 ZT4-7 79.76145038000001 77.38657618666667 82.13632457333334 ZT8-11 76.93977556 74.44054545 79.43900567 ZT12-15 75.05399408 66.69041888666666 83.41756927333333 ZT16-19 85.33591077 83.38354907 87.28827247 ZT20-23 77.32925087000001 73.25171261333334 81.40678912666667