At One School,the Average Amount of Time That Tenth-Graders Spend

question 104

Multiple Choice

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 from the previous mean of 21.6 hours.

• A)Upper-tailed
• B)Two-sided
• C)Lower-tailed

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Definitions:

Possible Values

The set of all potential outcomes or results that can arise from a specific event or experiment.

Significance Level

The likelihood of incorrectly discarding the null hypothesis in statistical scrutiny, often characterized by the alpha notation.

Multiple Regression Model

A statistical technique that models the relationship between a dependent variable and several independent variables to predict outcomes.

Annual Income

The total amount of income earned over a year from work, investments, or other sources.