condition mean min max ZT0-3 67.27755 67.27755 67.27755 ZT4-7 34.89945 34.89945 34.89945 ZT8-11 29.771 29.771 29.771 ZT12-15 148.583 148.583 148.583 ZT16-19 155.3295 155.3295 155.3295 ZT20-23 110.1695 110.1695 110.1695