condition mean min max ZT0-3 289.65 289.65 289.65 ZT4-7 211.0 211.0 211.0 ZT8-11 246.75 246.75 246.75 ZT12-15 412.75 412.75 412.75 ZT16-19 508.2 508.2 508.2 ZT20-23 364.29999999999995 364.29999999999995 364.29999999999995