If the Sampling Distribution of ₁ - ₂

question 114

Multiple Choice

If the sampling distribution of ₁ - ₂ cannot be assumed normal, we ________.

• A) are unable to compute a confidence interval
• B) are still able to use the z distribution to compute a confidence interval
• C) must use the t_df distribution with n₁ + n₂ - 2 degrees of freedom to compute a confidence interval
• D) must use the t_df distribution and calculate the degrees of freedom using n₁, n₂, s₁, and s₂ to compute a confidence interval

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Definitions:

Alcohol Consumption

Alcohol consumption refers to the drinking of alcoholic beverages and can range from light use to heavy drinking or alcohol dependence.

Representative Sample

A subset of a population that accurately reflects the characteristics of the larger group from which it is drawn.

Volunteer Bias

A bias in research outcomes that occurs due to differences between those who choose to participate in studies and those who do not.

Correlational Method

A research method used to establish the degree of relationship (correlation) between two characteristics, events, or behaviors.