condition mean min max ZT0-3 17.6821 17.6821 17.6821 ZT4-7 26.7298 26.7298 26.7298 ZT8-11 30.91395 30.91395 30.91395 ZT12-15 24.5642 24.5642 24.5642 ZT16-19 23.60935 23.60935 23.60935 ZT20-23 20.070149999999998 20.070149999999998 20.070149999999998