condition mean min max ZT0-3 575.9000000000001 575.9000000000001 575.9000000000001 ZT4-7 423.3 423.3 423.3 ZT8-11 424.7 424.7 424.7 ZT12-15 502.7 502.7 502.7 ZT16-19 554.65 554.65 554.65 ZT20-23 643.5 643.5 643.5