condition mean min max ZT0-3 396.4 396.4 396.4 ZT4-7 440.9 440.9 440.9 ZT8-11 516.95 516.95 516.95 ZT12-15 544.65 544.65 544.65 ZT16-19 471.6 471.6 471.6 ZT20-23 373.7 373.7 373.7