Consider the Following Test Scores Obtained by a Class ">$\text { cellpadding="0" cellspacing }=" 0 " \text { width }=52 \% \text { " border }=0 ">$

question 239

Multiple Choice

Consider the following test scores obtained by a class: ">$\text { cellpadding="0" cellspacing }=" 0 " \text { width }=52 \% \text { " border }=0 ">$
$$\begin{array} { l l } \text { Test Score } & \text { Frequency } \\90 & 2 \\80 & 5 \\70 & 10 \\60 & 5 \\50 & 3\end{array}$$ Find the variance and standard deviation, rounded to the nearest hundredth.

• A) variance: \(119.36\) standard deviation: \(10.93\)
• B) variance: \(10.93\) standard deviation: \(119.36\)
• C) variance: \(69.20\) standard deviation: \(10.93\)
• D) variance: \(69.20\) standard deviation: \(119.36\)
• E) variance: \(100.00\) standard deviation: \(10.00\)

---

Definitions:

Competitive

Characterizes a market scenario where multiple sellers strive to attract customers by offering better terms, prices, or products.

Low Costs

Describes situations or processes that require a minimal amount of financial resources to maintain or complete.

Long-run Economic Profits

Profits that occur when a firm's total revenue exceeds its total costs, including both explicit and implicit costs, over the long term.