condition mean min max ZT0-3 288.7 288.7 288.7 ZT4-7 404.4 404.4 404.4 ZT8-11 420.3 420.3 420.3 ZT12-15 474.85 474.85 474.85 ZT16-19 381.9 381.9 381.9 ZT20-23 287.15 287.15 287.15