condition mean min max ZT0-3 14.9706 14.5792 15.729849999999999 ZT4-7 16.35225 16.35225 16.35225 ZT8-11 30.63895 30.63895 30.63895 ZT12-15 25.698275 23.4236 27.972949999999997 ZT16-19 22.6084 22.6084 22.6084 ZT20-23 19.8599 19.8599 19.8599