condition mean min max ZT0-3 13.075219999999998 13.075219999999998 13.075219999999998 ZT4-7 17.859285 17.859285 17.859285 ZT8-11 10.711915 10.711915 10.711915 ZT12-15 11.249765 11.249765 11.249765 ZT16-19 20.362450000000003 20.362450000000003 20.362450000000003 ZT20-23 10.12535 10.12535 10.12535