A Researcher Wants to Know If Mood Is Affected by Music

question 8

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 classical
Music. Test the hypothesis that mood rating improved after being exposed to classical music.
Following are the mood ratings for the four participants: $\begin{array}{|l|l|l|}\hline & \begin{array}{c}\text { Before } \\\text { exposure }\end{array} & \begin{array}{c}\text { After } \\\text { exposure }\end{array} \\\hline \text { Participant \#1 } & 4.0 & 5.0 \\\hline \text { Participant \#2 } & 5.2 & 6.0 \\\hline \text { Participant \#3 } & 3.2 & 4.0 \\\hline \text { Participant \#4 } & 4.5 & 6.2 \\\hline\end{array}$ 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) \(\mathrm { H } _ { 0 } : \mu _ { 1 } = \mu _ { 2 } , \mathrm { H } _ { \mathrm { a } } : \mu _ { 1 } \neq \mu _ { 2 } ; \mathrm { p } = 0.008\); Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classical music improved mood rating.
• B) \(\mathrm { H } _ { 0 }\) : \(\mu _ { \text {difference } } = 0 , \mathrm { H } _ { \mathrm { a } } : \mu _ { \text {difference } } < 0 ; \mathrm { p } = 0.008\); Reject the null hypothesis; there is strong evidence to suggest that exposure to classical music improved mood rating.
• C) \(\mathrm { H } _ { 0 } : \mu _ { 1 } = \mu _ { 2 } , \mathrm { H } _ { \mathrm { a } } : \mu _ { 1 } < \mu _ { 2 } ; \mathrm { p } = 0.077\); Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classical music improved mood rating.
• D) \(\mathrm { H } _ { 0 } : \mu _ { \text {difference } } = 0 , \mathrm { H } _ { \mathrm { a } } : \mu _ { \text {difference } } > 0 ; \mathrm { p } = 0.922\); Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classical music improved mood rating.

Apply overhead to specific jobs using the predetermined overhead rate.

Determine the selling price of jobs based on markup percentages.

Understand the concept of departmentalized overhead rates and their application.

Calculate the unit product cost for jobs.

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Definitions:

Muscle Decreases

The reduction in muscle mass and strength, often attributed to aging, inactivity, or specific health conditions.

Bone Density

A measure of the amount of minerals (such as calcium) contained in a certain volume of bone, reflecting its strength and the risk for conditions like osteoporosis.

Aerobic Capacity

The maximum amount of oxygen the body can utilize during a specified period of usually intense exercise, a measure of cardiovascular fitness.

Fat Decreases

A reduction in the amount of adipose tissue in the body, which can be due to diet, exercise, or metabolic factors.