A Hypothesis Test Is to Be Performed $21.6$ Hours the Principal Introduces a Campaign to Encourage the Students

question 188

Multiple Choice

A hypothesis test is to be performed. State the null and alternative hypotheses.
-At one school, the average amount of time that tenth-graders spend watching television each week is $21.6$ hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased.

• A) Null hypothesis: mean time \(= 21.6\) hours
• Alternative hypothesis: mean time \(\leq 21.6\) hours
• B) Null hypothesis: mean time \(> 21.6\) hours
• Alternative hypothesis: mean time \(< 21\).6 hours
• C) Null hypothesis: mean time \(= 21.6\) hours
• Alternative hypothesis: mean time \(< 21.6\) hours
• D) Null hypothesis: mean time \(< 21\). 6 hours
• Alternative hypothesis: mean time \(= 21.6\) hours

---

Definitions:

Price Controls

Government-mandated prices that are generally imposed in the form of maximum or minimum legal prices.

Political Rationing

The allocation of resources or goods among the population based on political decisions or policies rather than market forces.

Price Controls

Government-imposed limits on the prices charged for goods and services, typically aimed at controlling inflation or ensuring affordability.

Waiting Lines

Queues formed by individuals waiting to purchase goods, receive services, or participate in some activity.