condition mean min max ZT0-3 713.95 713.95 713.95 ZT4-7 754.8 754.8 754.8 ZT8-11 523.6 523.6 523.6 ZT12-15 459.65 459.65 459.65 ZT16-19 308.0 308.0 308.0 ZT20-23 433.3 433.3 433.3