condition mean min max ZT0-3 509.6 509.6 509.6 ZT4-7 268.5 268.5 268.5 ZT8-11 387.85 387.85 387.85 ZT12-15 356.1 356.1 356.1 ZT16-19 344.1 344.1 344.1 ZT20-23 408.1 408.1 408.1