Two Independent Samples of Sizes 40 and 50 Are Randomly

question 89

Multiple Choice

Two independent samples of sizes 40 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) Student t-distributed with 88 degrees of freedom
• D) approximately normal and student t-distributed with 88 degrees of freedom
• E) none of these

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Definitions:

Thought Processes

The mental activities involved in understanding, processing, and communicating information.

Biological Rhythm

Natural cycles of physical, emotional, or intellectual changes that the body goes through, such as circadian rhythms.

Fluctuation

An irregular rising and falling in number or amount; a variation.

Expectations

Beliefs or anticipations about the future, often based on experience, knowledge, or perceived trends.