Solve the Problem $$\text { coefficient of variation } = 100 ( \mathrm {~s} / \overline { \mathrm { x } } )$$

question 83

Multiple Choice

Solve the problem.
-The coefficient of variation, expressed as a percent, is used to describe the standard deviation relative to the mean. It allows us to compare variability of data sets with different measurement units and is calculated as follows: $$\text { coefficient of variation } = 100 ( \mathrm {~s} / \overline { \mathrm { x } } )$$
Find the coefficient of variation for the following sample of weights (in pounds) :
$\begin{array} { l l l l l } 139 & 136 & 186 & 105 & 197 \\ 133 & 172 & 152 & 116 & 125 \end{array}$

• A) \(22.7 \%\)
• B) \(18.2 \%\)
• C) \(25.4 \%\)
• D) \(20.7 \%\)

---

Definitions:

Yerkes-Dodson Law

posits that an optimal level of arousal for performance exists, where too little or too much arousal can impair performance.

Optimal Levels

The most favorable, efficient, or effective state of something for a particular purpose or outcome.

Moderate Levels

Degrees or extents of a particular condition or activity that are considered average, not excessive or minimal.

Arousal Theory

A theory suggesting that people are motivated to maintain an optimal level of arousal, which varies from one individual to another.