condition mean min max ZT0-3 152.206672 152.206672 152.206672 ZT4-7 183.55105700000001 183.55105700000001 183.55105700000001 ZT8-11 213.16729099999998 213.16729099999998 213.16729099999998 ZT12-15 180.22427399999998 180.22427399999998 180.22427399999998 ZT16-19 215.7689455 215.7689455 215.7689455 ZT20-23 207.1997875 207.1997875 207.1997875