condition mean min max ZT0-3 22.7376 22.7376 22.7376 ZT4-7 28.5087495 28.5087495 28.5087495 ZT8-11 37.9676745 37.9676745 37.9676745 ZT12-15 30.715242500000002 30.715242500000002 30.715242500000002 ZT16-19 30.6618685 30.6618685 30.6618685 ZT20-23 25.7896025 25.7896025 25.7896025