condition mean min max ZT0-3 14.356754 14.356754 14.356754 ZT4-7 12.482254999999999 12.482254999999999 12.482254999999999 ZT8-11 11.763182 11.763182 11.763182 ZT12-15 13.724013 13.724013 13.724013 ZT16-19 11.226701 11.226701 11.226701 ZT20-23 13.7972645 13.7972645 13.7972645