Which of the following is a probability sampling technique?

HP CHO -9 October 2022

Nursing Research & Statistics

Easy

Appeared in: HP CHO -9 October 2022

Explanation

Probability sampling is a method where every member of the population has a known, non-zero chance of being selected.
Simple random sampling is the most basic type of probability sampling.
In simple random sampling, each individual is chosen by chance, and every member of the population has an equal probability of being selected.
This method minimizes bias and allows for the results to be generalized to the larger population.
Methods for simple random sampling include the lottery method, using a table of random numbers, or computer-generated random numbers.

Option B: Vocational is not a sampling technique. It typically refers to a dimension of health or rehabilitation related to a person's job or occupation.
Option C: Mental is not a sampling technique. It refers to a dimension of health concerning psychological and emotional well-being.
Option D: Social is not a sampling technique. It relates to a dimension of health involving a person's interactions, relationships, and community connections.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types of Sampling Techniques in Research as background academic context rather than a clinical decision trigger.
For nurses, understanding sampling methods is essential for practicing evidence-based care. It allows them to critically appraise research studies and determine if the findings are trustworthy and applicable to their patient population.
A study using a strong sampling method like simple random sampling is more likely to have results that are representative of the whole population, giving nurses more confidence in applying the evidence.
What if a study on a new hypertension drug used convenience sampling (a non-probability method) by only recruiting patients from a single, affluent clinic? The nurse should be cautious, as the results might not apply to patients from different socioeconomic backgrounds. The sample is not representative, limiting the generalizability of the findings.

How to Approach the Question

First, identify the core concept in the question stem, which is 'probability sampling technique'.
Define 'probability sampling' in your mind: it involves random selection where everyone has a chance to be picked.
Evaluate each option against this definition.
Option A, 'Simple random sampling', is the classic example of a probability sampling method.
Options B, C, and D ('Vocational', 'Mental', 'Social') are clearly from a different category of concepts, related to health dimensions, not research methods.
Conclude that 'Simple random sampling' is the only option that fits the definition of a probability sampling technique.

Concept Tested & Keywords

Qj1WjC-oBIHqkj63Ng3xxI

E6 NursingResearch Suresh Sharma 5e Part 1 pp. 236-238, 234-236

E6 NursingResearch Sukhpal Kaur p. 250-252