Trees are subjected to different levels of carbon dioxide

Chapter 3, Problem 68E

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QUESTION:

Problem 68E

Trees are subjected to different levels of carbon dioxide atmosphere with 6% of them in a minimal growth condition at 350 parts per million (ppm), 10% at 450 ppm (slow growth), 47% at 550 ppm (moderate growth), and 37% at 650 ppm (rapid growth). What are the mean and standard deviation of the carbon dioxide atmosphere (in ppm) for these trees in ppm?

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QUESTION:

Problem 68E

Trees are subjected to different levels of carbon dioxide atmosphere with 6% of them in a minimal growth condition at 350 parts per million (ppm), 10% at 450 ppm (slow growth), 47% at 550 ppm (moderate growth), and 37% at 650 ppm (rapid growth). What are the mean and standard deviation of the carbon dioxide atmosphere (in ppm) for these trees in ppm?

ANSWER:

Solution:

Step 1 of 2:

Here the data regarding carbon dioxide levels for the trees are are given.

6% of the trees are in a the minimal growth condition at 350 parts per million(ppm).

10% of the trees are in the slow growth condition at 450 ppm.

47% of the trees are in the moderate growth condition at 550 ppm.

37% of the trees are in the rapid growth condition at 650 ppm.

Using this we need to find the mean and the standard deviation of the carbon dioxide atmosphere for the trees.


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