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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. 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 X<sub>1</sub> and X<sub>2</sub> as given in the table. Consequently, D = X<sub>1</sub>-X<sub>2</sub>.   -Compute the standard deviation of the differences. A)  0.84 B)  0.78 C)  0.13 D)  0.11
-Compute the standard deviation of the differences.


Definitions:

Undue Influence

A situation where an individual is able to persuade another's decisions due to the relationship between the two, often leading to unfair outcomes.

Statute of Frauds

A legal principle that requires certain types of contracts to be in writing and signed by the parties involved in order to be enforceable.

Interest in Land

A legal or equitable claim on real property, such as ownership, a mortgage, or a lease.

Primary Obligation

A primary obligation is the main responsibility or liability that a party is bound to fulfill under the terms of a contract or agreement.

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