condition mean min max ZT0-3 43.89393333333334 36.86235 52.577600000000004 ZT4-7 34.51625 34.51625 34.51625 ZT8-11 29.10985 29.10985 29.10985 ZT12-15 37.398450000000004 31.382450000000002 43.41445 ZT16-19 58.9114 58.9114 58.9114 ZT20-23 52.3226 52.3226 52.3226