If We Are Testing the Hypothesis About the Mean of a Population

question 18

Multiple Choice

If we are testing the hypothesis about the mean of a population of paired differences with samples of n₁ = 10, n₂ = 10, the degrees of freedom for the t statistic is ________.

• A) 19
• B) 18
• C) 9
• D) 8
• E) 10

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Definitions:

Independent Variable

A variable that is manipulated or controlled in an experiment to test its effect on the dependent variable.

Coefficient of Correlation

A statistical measure that calculates the strength and direction of a linear relationship between two variables on a scatterplot.

Gas Mileage

A measure of a vehicle's fuel efficiency, commonly expressed in miles per gallon (MPG) or liters per 100 kilometers (L/100km).

Truck Speed

The rate at which a truck travels, typically measured in miles per hour (mph) or kilometers per hour (km/h).