condition mean min max ZT0-3 182.902196 182.902196 182.902196 ZT4-7 257.782526 257.782526 257.782526 ZT8-11 189.248622 189.248622 189.248622 ZT12-15 254.9008675 254.9008675 254.9008675 ZT16-19 182.800182 182.800182 182.800182 ZT20-23 179.2759495 179.2759495 179.2759495