What is the method of simple random sampling?

Appeared in: AIIMS Raipur NO - 2019 (Shift-2)

Explanation

A computer table of random numbers is a standard tool used to perform simple random sampling.
This method involves assigning a number to each member of the population and then using the random number table to select participants, ensuring each has an equal chance of being chosen.
It is a pure form of probability sampling, designed to create a representative sample and minimize selection bias.

Option A: Convenience sampling is a non-probability method where participants are chosen based on their easy accessibility, not by random selection. This introduces a high risk of bias.
Option C: Cluster sampling is a probability method, but it is not 'simple random'. It involves randomly selecting entire groups (clusters) from a population, not individual members.
Option D: Quota sampling is a non-probability method. While it ensures certain subgroups are represented proportionally, the actual selection of individuals within those subgroups is not random and is often based on convenience.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Methods of Simple Random Sampling as background academic context rather than a clinical decision trigger.
Nurses must understand sampling methods to critically appraise research articles and determine if the findings are generalizable and can be applied to their practice (evidence-based practice).
When participating in or conducting nursing research, choosing the right sampling method is crucial for the validity and reliability of the study's results.
What if? If a researcher wanted to study the experiences of nurses in a specific city but didn't have a list of all nurses, they might use cluster sampling (sampling a few hospitals randomly) instead of simple random sampling, as it would be more feasible.

How to Approach the Question

First, identify the core concept in the question: 'simple random sampling'.
Recall the definition of simple random sampling: every member of the population has an equal and independent chance of being selected.
Evaluate each option against this definition.
Recognize that 'Convenience sampling' and 'Quota sampling' are non-probability methods, so they cannot be correct.
Differentiate between 'Cluster sampling' (sampling groups) and 'Simple random sampling' (sampling individuals).
Conclude that a 'Computer table' of random numbers is a tool specifically designed to achieve simple random selection of individuals.

Concept Tested & Keywords

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E6 NursingResearch Suresh Sharma 5e Part 1 pp. 236-238, 245-247

E6 NursingResearch Sukhpal Kaur p. 260-262

Practise the full AIIMS Raipur NO - 2019 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.