condition mean min max ZT0-3 10.726825000000002 10.159600000000001 11.29405 ZT4-7 11.04755 11.04755 11.04755 ZT8-11 11.49915 11.49915 11.49915 ZT12-15 0 0 0 ZT16-19 9.67354 9.67354 9.67354 ZT20-23 9.98677 9.98677 9.98677