A Researcher Wants to Know If Mood Is Affected by Music

question 36

Multiple Choice

A researcher wants to know if mood is affected by music. She conducts a test on a sample of 4 randomly selected adults and measures mood rating before and after being exposed to classic rock music. Test the hypothesis that mood rating decreased after being exposed to classic rock music. Following are the mood ratings for the four participants: Assume that all conditions for testing have been met. Report the null and alternative hypothesis and p- value. At the 5% significance level, state your decision regarding the null hypothesis and your conclusion about the original claim. Round all values to the nearest thousandth.

• A)H0: µdifference = 0, Ha: µdifference > 0; p = 0.154; Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classic rock music decreased mood rating.
• B)H0: µdifference = 0, Ha: µdifference > 0; p = 0.015; Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classic rock music decreased mood rating.
• C)H0: µdifference = 0, Ha: µdifference > 0; p = 0.154; Reject the null hypothesis; there is strong evidence o suggest that exposure to classic rock music decreased mood rating.
• D)H0: µdifference = 0, Ha: µdifference × 0; p = 0.309; Reject the null hypothesis; there is strong evidence to suggest that exposure to classic rock music decreased mood rating.

Understand and apply the concept of linear regression to model real-world phenomena.

Identify the steps in finding the linear regression equation from a given dataset.

Distinguish between positive, negative, or no correlation from a given graph.

Recognize the kinds of data appropriate for scatterplot representation.

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Definitions:

Personnel

The employees or staff members of a business or organization responsible for its operations.

Reevaluation

The process of reviewing and assessing something again, often to see if any changes or adjustments need to be made.

Learning Curves

The premise that people and organizations get better at their tasks as the tasks are repeated; sometimes called experience curves.

Experience Curves

Graphical representations similar to learning curves, but focusing on how costs decline as a company gains experience in production over time.