condition mean min max ZT0-3 180.55 180.55 180.55 ZT4-7 274.5 274.5 274.5 ZT8-11 262.55 262.55 262.55 ZT12-15 341.79999999999995 341.79999999999995 341.79999999999995 ZT16-19 265.5 265.5 265.5 ZT20-23 240.45000000000002 240.45000000000002 240.45000000000002