condition mean min max ZT0-3 20.79995 19.44935 22.15055 ZT4-7 9.77002 9.77002 9.77002 ZT8-11 9.953355 9.953355 9.953355 ZT12-15 0 0 0 ZT16-19 15.62835 15.62835 15.62835 ZT20-23 13.821850000000001 13.821850000000001 13.821850000000001