TABLE 10-14
a Problem with a Telephone Line That

question 31

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, suppose ? = 0.05. Which of the following represents the result of the relevant hypothesis test?

• A) The null hypothesis is not rejected.
• B) The null hypothesis is rejected.
• C) The alternative hypothesis is rejected.
• D) Insufficient information exists on which to make a decision.

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Definitions:

Interexchange

The act or process of reciprocal trade or communication, sharing, or interchange between two or more parties.

Functional Explanation

An explanation that accounts for the presence of a trait or behavior by its function and how it contributes to the survival or efficiency of a system or organism.

Social Hierarchy

The organization of individuals within a society into different levels of status or authority, often based on factors like wealth, occupation, or education.

Stratification System

The hierarchical organization of society into different social classes, castes, or other groups, based on factors like wealth, occupation, and social status.