What Is Pooled Variance

question 23

Multiple Choice

What is pooled variance?

• A)The weighted average of the two sample variances.
• B)The variance of the difference between the sample means.
• C)The sum of the two sample variances.
• D)The variance of the populations from which the samples were drawn.

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Definitions:

Natural Log

The logarithm to the base e, where e is an irrational constant approximately equal to 2.71828, often used in mathematics, physics, and engineering.

Risk Averter

An individual who prefers outcomes that are certain over those with any level of risk, usually willing to accept lower returns to avoid uncertainty.

Expected Value

A calculated average outcome of a random variable, considering all possible outcomes and their probabilities.

Natural Log

A logarithm to the base e (where e is approximately 2.71828), used extensively in mathematical, economic, and scientific applications.