condition mean min max ZT0-3 325.55 325.55 325.55 ZT4-7 630.5 630.5 630.5 ZT8-11 561.35 561.35 561.35 ZT12-15 408.85 408.85 408.85 ZT16-19 307.55 307.55 307.55 ZT20-23 337.1 337.1 337.1