condition mean min max ZT0-3 50.81145 47.75255 53.87035 ZT4-7 53.2785 53.2785 53.2785 ZT8-11 63.514 63.514 63.514 ZT12-15 0 0 0 ZT16-19 106.21835 106.21835 106.21835 ZT20-23 79.51795 79.51795 79.51795