Why Would a Nurse Researcher Choose to Assign Randomly the Subjects

question 28

Multiple Choice

Why would a nurse researcher choose to assign randomly the subjects in a study?

• A) To ensure that all groups within a study are representative of the larger population
• B) To increase the chances that the study groups will be different from each other with regard to extraneous variables
• C) To ensure that current events do not influence the outcomes of the study
• D) To eliminate the need for establishing specific study criteria and subject eligibility

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Definitions:

Coefficient of Determination

A statistical measure that represents the proportion of the variance for a dependent variable that's explained by an independent variable or variables in a regression model.

Correlation

A statistical measure that expresses the extent to which two variables change together, ranging from -1 to 1.

Pearson Correlation

A measure of the linear relationship between two variables, ranging from -1 to 1, where 1 means a perfect positive correlation and -1 means a perfect negative correlation.

Correlation Coefficient

A statistical measure that quantifies the degree of relationship or association between two variables.