condition mean min max ZT0-3 424.70000000000005 424.70000000000005 424.70000000000005 ZT4-7 476.7 476.7 476.7 ZT8-11 339.5 339.5 339.5 ZT12-15 461.25 461.25 461.25 ZT16-19 424.85 424.85 424.85 ZT20-23 358.65 358.65 358.65