Two Independent Samples of Sizes 20 and 30 Are Randomly

question 52

Multiple Choice

Two independent samples of sizes 20 and 30 are randomly selected from two normally distributed populations. Assume that the population variances are unknown but equal. In order to test the difference between the population means, , the sampling distribution of the sample mean difference, , is:

• A)normal.
• B)Student -t with 50 degrees of freedom.
• C)Student -t with 48 degrees of freedom.
• D)None of these choices.

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Definitions:

Social Category

Groupings of individuals based on shared characteristics or social identity, such as race, gender, or age.

Situational Attribution

Situational attribution is the process of attributing an individual's behavior to external factors or circumstances rather than to their internal characteristics or dispositions.

Consensus Cues

Attribution cues that reflect how a person’s behaviour compares with that of others.

Prototype

An initial model or sample of a product used to test a concept or process before final production.