The Symbol $\bar { x } _ { D }$ Refers To:
A)the Difference in the Means of Two Independent

question 115

Multiple Choice

The symbol $\bar { x } _ { D }$ refers to:

• A)the difference in the means of two independent populations.
• B)one matched pairs difference.
• C)the mean difference in the pairs of observations.
• D)None of these choices.

---

Definitions:

Biodegradable Polymer

A type of polymer that can be broken down by microorganisms into water, carbon dioxide (or methane), and biomass, within a reasonably short period of time.

Lactone Monomer

A singular molecular unit that can form polymers and contains a lactone ring, a cyclic ester.

Compound Name

The unique, standardized nomenclature associated with a chemical substance that describes its structure or formula.

Compound

A material resulting from the chemical union of two or more elements.