condition mean min max ZT0-3 502.65 502.65 502.65 ZT4-7 412.4 412.4 412.4 ZT8-11 425.45 425.45 425.45 ZT12-15 440.2 440.2 440.2 ZT16-19 571.6500000000001 571.6500000000001 571.6500000000001 ZT20-23 563.6 563.6 563.6