condition mean min max ZT0-3 300.3 300.3 300.3 ZT4-7 296.5 296.5 296.5 ZT8-11 329.45 329.45 329.45 ZT12-15 557.0 557.0 557.0 ZT16-19 575.05 575.05 575.05 ZT20-23 359.5 359.5 359.5