Two Independent Samples of Sizes 20 and 30 Are Randomly

question 133

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:

Affective Component

Part of an attitude related to emotion and feeling, influencing how individuals feel about an object, person, or situation.

Situational

Pertaining to or dependent upon the context or specific circumstances in which an event occurs.

Specific Behaviors

Observable actions or reactions of individuals in response to external or internal stimuli.

Attitudes

A learned predisposition to respond in a consistently favorable or unfavorable manner with respect to a given object.