Instruction 2 -Referring to Instruction 2

question 134

Multiple Choice

Instruction 2.4
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array} { | l | l | } \hline \text { Time (in Minutes) } & \text { Relative Frequency } \\\hline0 \text { but less than 5 } & 0.37 \\\hline 5 \text { but less than 10 } & 0.22 \\\hline \begin{array} { l } 10 \text { but less than } \\15\end{array} & 0.15 \\\hline \begin{array} { l } 15 \text { but less than } \\20\end{array} & 0.10 \\\hline \begin{array} { l } 20 \text { but less than } \\25\end{array} & 0.07 \\\hline \begin{array} { l } 25 \text { but less than } \\30\end{array} & 0.07 \\\hline 30 \text { or more } & 0.02 \\\hline\end{array}$$
-Referring to Instruction 2.4,if 100 calls were sampled,_________ of them would have lasted less than 5 minutes or at least 30 minutes or more.

• A) 39
• B) 35
• C) 37
• D) None of the above.

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Definitions:

Economies of Scale

This concept describes the cost advantage achieved by an enterprise when production becomes efficient, resulting in a decrease in the per-unit cost as output increases.

Perfect Competition

describes a theoretical market structure characterized by many buyers and sellers, homogenous products, and free entry and exit, leading to optimal distribution of goods and services.

Barriers to Entry

Obstacles that make it difficult for new competitors to enter a market, such as high startup costs, strict regulations, or established brand loyalty.

Economic Profits

The excess of total revenues over total costs, including both explicit costs and opportunity costs, indicating a return beyond the normal profit level.