When an attribute is extremely varied in the group under investigation, the group is said to be?

DSSSB - 29 August 2019 (Shift-2)

Nursing Research & Statistics

Easy

Appeared in: DSSSB - 29 August 2019 (Shift-2)

Explanation

The term 'heterogeneous' directly refers to a group composed of diverse or varied elements.
In a research context, when an attribute like age, weight, or disease severity is 'extremely varied' among participants, the group is considered heterogeneous for that variable.
This high variability means the data points are spread out, which has important implications for statistical analysis and the interpretation of results.

Option A: A 'dependent' variable is the outcome or effect that is measured in a study; it is not a term used to describe the variability within a group.
Option B: An 'independent' variable is the factor that is manipulated or presumed to cause a change in the dependent variable. It does not describe the composition of the group itself.
Option C: A 'homogenous' group is the opposite of a heterogeneous one. It describes a group where members are very similar and there is little variation in the attribute being studied.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Terminology for group variability in research methodology as background academic context rather than a clinical decision trigger.
When appraising a research study, nurses must assess the sample's homogeneity or heterogeneity to determine how applicable the findings are to their own patient population.
A highly heterogeneous sample may increase the external validity (generalizability) of a study, but it can also introduce confounding variables that make it harder to detect the true effect of an intervention.
What if? If a researcher wants to study a new diabetes medication but their sample is heterogeneous for age, diet, and exercise habits, they might use a statistical technique like analysis of covariance (ANCOVA) to control for these variations or use stratified sampling to ensure subgroups are adequately represented.

How to Approach the Question

First, identify the key term in the question stem, which is 'extremely varied'.
Understand that the question is asking for a research term that describes a group with high diversity.
Evaluate the options based on their definitions in research methodology.
Eliminate 'Dependent' and 'Independent' as they refer to types of variables (cause and effect), not group characteristics.
Differentiate between 'Homogenous' (similar, low variation) and 'Heterogeneous' (different, high variation).
Match the keyword 'varied' to its synonym 'heterogeneous' to find the correct answer.

Concept Tested & Keywords

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