Two Independent Samples of Sizes 50 and 50 Are Randomly

question 18

Multiple Choice

Two independent samples of sizes 50 and 50 are randomly selected from two populations to test the difference between the population means, .The sampling distribution of the sample mean difference is

• A)normally distributed.
• B)approximately normal.
• C)t - distributed with 98 degrees of freedom.
• D)chi-squared distributed with 99 degrees of freedom.

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Definitions:

Aversive CS

A conditioned stimulus that predicts an unpleasant outcome, leading to aversive learning.

Neutral US

Refers to a stimulus that does not initially elicit a strong emotional or physiological response, used in behavioral conditioning experiments.

Conditioned Response

A conditioned reaction developed in response to a previously irrelevant stimulus after its frequent association with a stimulus that elicits an automatic response.

Original CS

In classical conditioning, the conditioned stimulus (CS) that is consistently paired with an unconditioned stimulus (US) to produce a conditioned response (CR).