Use the Following to Answer Questions

question 5

Multiple Choice

Use the following to answer questions
A researcher wanted to determine if using an octane booster would increase gasoline mileage. A random sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks with the booster. Use the definitions of X₁ and X₂ as given in the table. Consequently, D = X₁-X₂.
-What critical value should be used at α = 0.05?

• A) -2.447
• B) -2.365
• C) -1.943
• D) -1.895

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Definitions:

Anti-Gravitational Fields

Hypothetical phenomena or technology that would counteract the force of gravity, often discussed in the context of science fiction or theoretical physics.

Variable Costs

Costs that change in proportion to the level of activity or volume of output in a business.

Law of Diminishing Returns

An economic principle stating that, holding all else constant, as one input variable to the production process is increased, there comes a point when the added output from each additional unit of input decreases.

Productive

refers to the capability of producing significant amounts of goods and services, or contributing to economic output efficiently.