condition mean min max ZT0-3 202.160904 202.160904 202.160904 ZT4-7 281.5076775 281.5076775 281.5076775 ZT8-11 353.0399285 353.0399285 353.0399285 ZT12-15 314.1689715 314.1689715 314.1689715 ZT16-19 334.4436005 334.4436005 334.4436005 ZT20-23 274.78107550000004 274.78107550000004 274.78107550000004