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

question 37

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 the standardized value of the estimate of the mean of the sampling distribution for the difference between sample means?

• A) 2.0115
• B) 0.3544
• C) 2.2140
• D) 0.2025

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Definitions:

Internal Locus

A psychological term referring to individuals who believe they have control over the outcomes of their actions and life events.

Adaptation-Level Phenomenon

The psychological process by which individuals adjust their expectations and standards based on previous experiences, influencing their perception of new stimuli.

Type B Personality

A disposition typified by its placid, lenient, and relaxed manner.

External Locus

A belief system where individuals perceive their outcomes in life as being controlled by external forces or chance.