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

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Definitions:

Black Faces

A term that could relate to representation and perceptions of Black individuals in visual media and societal contexts, depending on context it may be used differently.

Dual Process Approach

A theory suggesting that the human mind operates via two different systems: one fast and intuitive and the other slow and rational.

Process 1

Often used to denote a basic, initial, or primary procedure or step in a series of actions or operations.

Automatically

Occurring or performed without conscious thought or intention, often as a result of learned behavior patterns.