condition mean min max ZT0-3 64.32745 64.32745 64.32745 ZT4-7 36.93 36.93 36.93 ZT8-11 35.1653 35.1653 35.1653 ZT12-15 77.88845 77.88845 77.88845 ZT16-19 67.40605 67.40605 67.40605 ZT20-23 88.15045 88.15045 88.15045