condition mean min max ZT0-3 21.5054 21.5054 21.5054 ZT4-7 6.90591 6.90591 6.90591 ZT8-11 10.565750000000001 10.565750000000001 10.565750000000001 ZT12-15 22.6552 22.6552 22.6552 ZT16-19 46.5607 46.5607 46.5607 ZT20-23 27.37695 27.37695 27.37695