condition mean min max ZT0-3 571.7 571.7 571.7 ZT4-7 481.7 481.7 481.7 ZT8-11 481.15 481.15 481.15 ZT12-15 432.70000000000005 432.70000000000005 432.70000000000005 ZT16-19 577.65 577.65 577.65 ZT20-23 589.0 589.0 589.0