condition mean min max ZT0-3 24.33675 21.87175 26.80175 ZT4-7 30.159 30.159 30.159 ZT8-11 74.40055 74.40055 74.40055 ZT12-15 0 0 0 ZT16-19 60.51835 60.51835 60.51835 ZT20-23 35.962 35.962 35.962