The Z-Test for Two Means Is Appropriate Whenever the Two $\sigma_{1}, \sigma_{2}$

question 9

Multiple Choice

The z-test for two means is appropriate whenever the two population variances ( $\sigma_{1}, \sigma_{2}$ ) are ______.

• A) unknown
• B) known
• C) normally distributed
• D) beyond the critical value for statistical significance

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Definitions:

Events A And B

Two occurrences within a probability space that are considered for their individual likelihood as well as their combined or conditional probabilities.

Sample Space

Sample space is the set of all possible outcomes or results of a probabilistic experiment.

Outcomes

The possible results that may come from a given action, experiment, or situation.

Mutual Fund

A financial vehicle that pools money from many investors to purchase a diversified portfolio of stocks, bonds, or other securities.