condition mean min max ZT0-3 239.802014 239.802014 239.802014 ZT4-7 226.751799 226.751799 226.751799 ZT8-11 199.92408849999998 199.92408849999998 199.92408849999998 ZT12-15 223.815245 223.815245 223.815245 ZT16-19 195.358787 195.358787 195.358787 ZT20-23 183.59722399999998 183.59722399999998 183.59722399999998