In the Equations for a T-Test in Matched or Dependent $t_{a k t}=\frac{\bar{X}_{D}}{s_{D} / \sqrt{n}}$

question 8

Multiple Choice

In the equations for a t-test in matched or dependent samples, $t_{a k t}=\frac{\bar{X}_{D}}{s_{D} / \sqrt{n}}$ , $\bar{X}_{D}$ is ______.

• A) the standard deviation
• B) the variance
• C) the mean of one group
• D) the mean of the difference between each pair of scores in the sample

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Definitions:

Herbivorous

An organism that feeds exclusively on plant materials, including leaves, stems, fruits, and roots.

Cnidarians

A phylum of aquatic invertebrates that includes jellyfish, corals, and sea anemones, known for their distinctive stinging cells called cnidocytes.

Gastropods

A large class of mollusks that include snails and slugs, characterized by a single shell (though some are shell-less) and a muscular foot for locomotion.

Ingest Food

The act of consuming food by mouth, initiating the process of digestion.