Biology
Biology, 27.07.2019 02:30, sotoamerica0814

Assume that trees are subjected to different levels of carbon dioxide atmosphere with 6% of the trees in a minimal growth condition at 350 parts per million (ppm), 12% at 440 ppm (slow growth), 49% at 570 ppm (moderate growth), and 33% at 630 ppm (rapid growth). what is the mean and standard deviation of the carbon dioxide atmosphere (in ppm) for these trees?

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