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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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Answer: In Exercises, find the coefficient of variation

Chapter 3, Problem 23BSC

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QUESTION:

In Exercises 21–24, find the coefficient of variation for each of the two samples; then compare the variation. (The same data were used in Section 3­2.)

Political Contributions Listed below are contributions (in dollars) made to the two presidential candidates in the most recent election. All contributions are from the same Zip code as the author, and the data are from the Huffington Post.

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QUESTION:

In Exercises 21–24, find the coefficient of variation for each of the two samples; then compare the variation. (The same data were used in Section 3­2.)

Political Contributions Listed below are contributions (in dollars) made to the two presidential candidates in the most recent election. All contributions are from the same Zip code as the author, and the data are from the Huffington Post.

ANSWER:

Solution 23BSC

Step 1 of 6

For Obama:

We know that the mean of a given set of observations obtained by adding those observations and divide that result with number of given observations. The mean contribution made to the Presidential candidate Obama in a recent election is

Therefore, the mean contribution made to the Presidential candidate Obama in a recent election is $653.87.

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