condition mean min max ZT0-3 640.4 640.4 640.4 ZT4-7 557.1 557.1 557.1 ZT8-11 495.65 495.65 495.65 ZT12-15 637.2 637.2 637.2 ZT16-19 794.7 794.7 794.7 ZT20-23 654.7 654.7 654.7