condition mean min max ZT0-3 538.0 538.0 538.0 ZT4-7 641.5 641.5 641.5 ZT8-11 601.55 601.55 601.55 ZT12-15 640.05 640.05 640.05 ZT16-19 585.7 585.7 585.7 ZT20-23 572.1 572.1 572.1