condition mean min max ZT0-3 16.0717 14.09345 18.04995 ZT4-7 10.38871 10.38871 10.38871 ZT8-11 8.551300000000001 8.551300000000001 8.551300000000001 ZT12-15 0 0 0 ZT16-19 13.316 13.316 13.316 ZT20-23 15.03765 15.03765 15.03765