condition mean min max ZT0-3 499.463183 499.463183 499.463183 ZT4-7 362.22429350000004 362.22429350000004 362.22429350000004 ZT8-11 359.0078215 359.0078215 359.0078215 ZT12-15 435.709735 435.709735 435.709735 ZT16-19 439.69320700000003 439.69320700000003 439.69320700000003 ZT20-23 484.42308149999997 484.42308149999997 484.42308149999997