TABLE 10-14
a Problem with a Telephone Line That

question 124

Multiple Choice

TABLE 10-14
A problem with a telephone line that prevents a customer from receiving or making calls is disconcerting to both the customer and the telephone company. The data on samples of 20 problems reported to two different offices of a telephone company and the time to clear these problems (in minutes) from the customers' lines are collected. Below is the Excel output to see whether there is evidence of a difference in the mean waiting time between the two offices assuming that the population variances in the two offices are not equal.
$$\begin{array}{l}\text { t- Test: Two- Sample Assuming Unequal Variances }\\\begin{array} { l r r } \hline & \text { Office 1 } & \text { Office 2 } \\\hline \text { Mean } & 2214 & 2.0115 \\\text { Variance } & 2.951657 & 3.57855 \\\text { Observations } & 20 & 20 \\\text { Hypothesized Mean Difference } & 0 & \\\mathrm { df } & 38 & \\\mathrm { t } \text { Stat } & 0.354386 & \\\mathrm { P } ( \mathrm { T } < = \mathrm { t } ) \text { one- tail } & 0.362504 & \\\mathrm { t } \text { Critical one- tail } & 1.685953 & \\\mathrm { P } ( \mathrm { T } < = \mathrm { t } ) \text { two- tail } & 0.725009 & \\\mathrm { t } \text { Critical two- tail } & 2.024394 &\end{array}\end{array}$$
-Referring to Table 10-14, what is(are) the critical value(s) of the relevant hypothesis test if the level of significance is 0.10?

• A) 1.6860
• B) ±2.0244
• C) 2.0244
• D) ±1.6860

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Definitions:

Overvalued Currencies

A situation where a currency is trading at a higher value on the foreign exchange market than is warranted by the country’s economic fundamentals.

Undervalued Currencies

Currencies that are traded at a lower exchange rate than their perceived or actual economic value, often due to government intervention or market forces.

Domestic Manufacturing

The production of goods within a country's borders, focusing on local industries and labor forces rather than outsourcing.

Currency Valuation

The process of determining the value of one currency in terms of another, often influenced by market conditions, economic indicators, and governmental policies.