condition mean min max ZT0-3 53.79343 53.79343 53.79343 ZT4-7 52.762913 52.762913 52.762913 ZT8-11 62.548567999999996 62.548567999999996 62.548567999999996 ZT12-15 47.9912625 47.9912625 47.9912625 ZT16-19 58.744798 58.744798 58.744798 ZT20-23 53.828340999999995 53.828340999999995 53.828340999999995