condition mean min max ZT0-3 305.100364 305.100364 305.100364 ZT4-7 169.45412449999998 169.45412449999998 169.45412449999998 ZT8-11 130.178016 130.178016 130.178016 ZT12-15 51.821953 51.821953 51.821953 ZT16-19 94.85129699999999 94.85129699999999 94.85129699999999 ZT20-23 145.997182 145.997182 145.997182