When Creating Samples for Outcomes Research, Which of the Following

question 10

Multiple Choice

When creating samples for outcomes research, which of the following is not a generally accepted guideline to follow?

• A) All patients are represented.
• B) Heterogeneous samples are preferred.
• C) Random sampling is very desirable.
• D) Very large samples are needed.

---

Definitions:

Third Variable

A factor, often unmeasured, that can be the true cause behind the observed relationship between two variables.

Correlational Method

Research in which two or more variables are measured and compared to determine to what extent, if any, they are associated.

Quasi-Experimental Design

A research strategy that attempts to estimate the causal impact of an intervention without random assignment to treatment or control groups.

Experimental Method

A study in which a researcher manipulates a variable, referred to as the independent variable, measures possible effects on another variable, referred to as the dependent variable, and tries to hold all other variables constant.