condition mean min max ZT0-3 17.314100000000003 17.314100000000003 17.314100000000003 ZT4-7 13.1064 13.1064 13.1064 ZT8-11 17.2908 17.2908 17.2908 ZT12-15 23.51025 23.51025 23.51025 ZT16-19 21.5835 21.5835 21.5835 ZT20-23 20.29585 20.29585 20.29585