A Sample of N = 9 College Students Is Used

question 41

Multiple Choice

A sample of n = 9 college students is used to evaluate the effectiveness of a new Study Skills Workshop.Each student's grade point average (GPA) is recorded for the semester before the workshop and for the semester after the workshop.The average GPA improved by M_D = 0.60 points with s² = 0.09.The researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population.What is the 80% confidence interval for these data?​

• A)​µ_D = 0.60 + 0.01(1.397)
• B)​µ_D = 0.60 + 0.09(1.860)
• C)​µ_D = 0.60 + 0.10(1.397)
• D)​µ_D = 0.60 + 0.10(1.860)

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Definitions:

Social Inefficiencies

Situations where resources are not allocated efficiently due to factors such as externalities, public goods, or market power, leading to a loss of social welfare.

Monopolist

A single seller in a market with no close substitutes for the product or service, giving them significant control over prices and output.

Supply Curve

A graphical representation showing the relationship between the price of a good or service and the quantity of that good or service that a supplier is willing and able to supply to the market.

Marginal Cost Curve

A graphical representation that shows how the cost of producing one additional unit of a good changes as the production volume varies.