condition mean min max ZT0-3 14.2834 13.640799999999999 14.926 ZT4-7 8.242965 8.242965 8.242965 ZT8-11 8.695125 8.695125 8.695125 ZT12-15 0 0 0 ZT16-19 12.2681 12.2681 12.2681 ZT20-23 12.6955 12.6955 12.6955