During a Test Period, an Experimental Group of 10 Vehicles

question 5

Multiple Choice

During a test period, an experimental group of 10 vehicles using an 85 percent ethanol-gasoline mixture showed mean CO₂ emissions of 667 pounds per 1000 miles, with a standard deviation of 20 pounds. A control group of 14 vehicles using regular gasoline showed mean CO₂ emissions of 679 pounds per 1000 miles with a standard deviation of 15 pounds. Assuming equal variances, the pooled variance is:

• A)296.59
• B)225.00
• C)400.00
• D)522.16

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Definitions:

Modify or Rescind

To change, alter, or revoke an agreement or contract either partially or completely.

Incidental Beneficiary

A third party who unintentionally benefits from a contract but has no legal right to enforce the contract terms.

Intended Beneficiary

A person for whom a contract is specifically made, who has the right to enforce the terms of the contract, even though they are not a party to it.

Promisee

An individual or entity to whom a promise or commitment is made.