condition mean min max ZT0-3 557.969075 557.969075 557.969075 ZT4-7 827.4086695 827.4086695 827.4086695 ZT8-11 761.1530625 761.1530625 761.1530625 ZT12-15 739.365457 739.365457 739.365457 ZT16-19 515.4055875 515.4055875 515.4055875 ZT20-23 532.2990205 532.2990205 532.2990205