condition mean min max ZT0-3 4.45392 4.25788 4.64996 ZT4-7 5.032845 5.032845 5.032845 ZT8-11 3.104265 3.104265 3.104265 ZT12-15 0 0 0 ZT16-19 4.66835 4.66835 4.66835 ZT20-23 4.9982299999999995 4.9982299999999995 4.9982299999999995