Mack Trucks Decides to Conduct an Experiment to Determine If $\mathrm{X} \quad \mathrm{O}_{1}$

question 31

Multiple Choice

Mack Trucks decides to conduct an experiment to determine if a new oil additive actually results in increased fuel efficiency. They find a lab that contains 50 engines that are exactly alike. Mack randomly divides the 50 engines into two groups an experimental group (which has the new oil additive) and the control group (which does not have the new oil additive) . They pour the exact same amount of fuel into all 50 engines and time how long each engine runs. Afterward, they average the length of time run by the 25 engines in the control group versus the 25 engines in the experimental group. Which of the following represents the experimental design in this study?

• A)\(\mathrm{X} \quad \mathrm{O}_{1}\)
• B)\(\text { (R) } \mathrm{O}_{1} \mathrm{X} \quad \mathrm{O}_{2}\)
• \(\begin{array}{ll}
• \mathrm{O}_{3} & \mathrm{O}_{4}
• \end{array}\)
• C)\(\mathrm{O}_{1} \mathrm{X} \quad \mathrm{O}_{2}\)
• D)\(\text { (R) } \mathrm{O}_{1} \mathrm{X} \quad \mathrm{O}_{2}\)
• \(\text { (R) } \mathrm{O}_{3} \quad \mathrm{D} \quad \mathrm{O}_{4}\)
• E)\(\text { (R) } \mathrm{O}_{1} \quad \mathrm{O}_{2}\)
• \(\begin{array}{lll}
• \mathrm{O}_{3} & \mathrm{D} & \mathrm{O}_{4}
• \end{array}\)

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Definitions:

Bill Of Material

A complete rundown of essential substances, components, and procedures for constructing, crafting, or restoring a product or service.

Cumulative Lead Time

The total time required to manufacture a product, including the time to procure all necessary materials and components.

Component Y

A hypothetical or specific part of a larger system or machine, typically referred to in the context of manufacturing, assembly, or engineering projects.

Part Z

A hypothetical or specific component within a larger system or product, often used to discuss or analyze a particular aspect of a process or design.