condition mean min max ZT0-3 51.55155019583333 50.150356384999995 52.95274400666667 ZT4-7 52.769849805 51.37848245666667 54.16121715333333 ZT8-11 57.69137669 57.66692666 57.71582672 ZT12-15 63.233206645 62.35067047333334 64.11574281666667 ZT16-19 63.410448114999994 58.691432346666666 68.12946388333333 ZT20-23 54.91540571 54.14302055 55.68779087