TABLE 10-14
a Problem with a Telephone Line That Prevents

question 135

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.
$$\begin{array}{l}\text { t- Test: Two- Sample Assuming Unequal Variances }\\\begin{array} { l r r } \hline & \text { Office 1 } & \text { Office 2 } \\\hline \text { Mean } & 2214 & 2.0115 \\\text { Variance } & 2.951657 & 3.57855 \\\text { Observations } & 20 & 20 \\\text { Hypothesized Mean Difference } & 0 & \\\mathrm { df } & 38 & \\\mathrm { t } \text { Stat } & 0.354386 & \\\mathrm { P } ( \mathrm { T } < = \mathrm { t } ) \text { one- tail } & 0.362504 & \\\mathrm { t } \text { Critical one- tail } & 1.685953 & \\\mathrm { P } ( \mathrm { T } < = \mathrm { t } ) \text { two- tail } & 0.725009 & \\\mathrm { t } \text { Critical two-tail } & 2.024394 & \\\hline\end{array}\end{array}$$
-Referring to Table 10-14, suppose ? = 0.05. Which of the following represents the correct conclusion?

• A) There is evidence of a difference in the variability of the waiting time between the two offices.
• B) There is no evidence that the variability of the waiting time between the two offices are the same.
• C) There is no evidence of a difference in the variability of the waiting time between the two offices.
• D) There is evidence that the variability of the waiting time between the two offices are the same.

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Definitions:

Designated Personnel

Individuals who are specifically chosen or assigned to carry out particular tasks or responsibilities.

Cash Receipts

The actual money received during a given period, including all forms of payment such as cash, checks, and credit card payments.

Establishment Of Responsibility

An accounting principle that ensures specific duties are assigned to individuals to increase accountability and prevent errors and fraud.

Treasurer

A treasurer is an officer of a company or organization responsible for managing financial operations, including investment, risk management, and corporate finance.