In a Controlled Laboratory Environment, a Random Sample of 10

question 12

Multiple Choice

In a controlled laboratory environment, a random sample of 10 adults and a random sample of 10 children were tested by a psychologist to determine the room temperature that each person finds most comfortable. The data are summarized below:

$\begin{array}{lcc}\hline & \text { Sample Mean } & \text { Sample Variance } \\\hline \text { Adults (1) } & 77.5^{\circ} \mathrm{F} & 4.5 \\\text { Children (2) } & 74.5^{\circ} \mathrm{F} & 2.5 \\\hline\end{array}$

If the psychologist wished to test the hypothesis that children prefer warmer room temperatures than adults, which set of hypotheses would he use?

• A) \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) = 0\) vs. \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) > 0\)
• B) \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) = 3\) vs. \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) \neq 0\)
• C) \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) = 0\) vs. \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) = 0\)
• D) \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) = 0\) vs. \(H _ { 0 } : \left( \mu _ { 1 } - \mu _ { 2 } \right) < 0\)

---

Definitions:

Unionized

Describes a workplace or workforce that is represented by one or more labor unions, which negotiate wages, work rules, and working conditions.

Strike

An action of unionized employees in which they (1) discontinue working for the employer and (2) take steps to prevent other potential workers from offering their services to the employer.

Product Market

The marketplace where final goods or services are traded, allowing businesses to sell their products directly to consumers or users.

Labor Market

The supply and demand for labor, where employers seek to hire workers and workers seek employment, influencing wages and employment levels.