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Respond to a classmate and discuss if their choices provide a representative sample of the population being studied. (150 words)
Classmates Post:
Several different sampling techniques are available, and they can be divided into two groups: probability sampling and non-probability sampling.
Probability sampling involves random selection, allowing for statistically solid inferences about the whole group.
Stratified sampling, a method that divides the population into subgroups or strata with similar characteristics, is a powerful tool in research. This method allows us to group people who are alike in some way, which in turn, allows us to account for variations in the measurement of interest between different subgroups. By doing so, we enhance the accuracy and reliability of our sample, ensuring that our findings are more representative of the entire population.
2. Non-probability sampling, on the other hand, involves non-random selection based on convenience or other criteria. This method allows for quick and efficient data collection, making the research process more practical and resourceful.
Judgment or Purposeful sampling, also known as selective or subjective sampling, is a versatile technique. It allows for adaptability and open-mindedness in the researcher’s judgment when choosing whom to ask to participate, fostering a flexible and open-minded approach to research. While offering a different level of generalizability than probability sampling, non-probability sampling is a practical choice for many researchers. Generalizability refers to how well the findings from a sample can be applied to the larger population. Probability sampling generally provides higher generalizability, while non-probability sampling may be more limited. However, non-probability sampling is a practical choice for many researchers. This method involves non-random selection based on convenience or other criteria, making data collection more accessible and more cost-effective. This practicality allows researchers to conduct research within their means, maximizing their resources and making the most of their research budget. While it does not start with a complete sampling frame, and some individuals may not be selected, it is still helpful for exploratory research and hypothesis generation. Its affordability and ease of use make it a valuable tool in research.
The population and sampling method I chose for my PICO question are individuals at risk of cardiovascular disease, including women and men ages 45-80 years old, and who have associated risk factors such as diabetes, hypertension, and obesity. The method I would use is stratified sampling because, for my question involving the correlation between adherence to the Mediterranean diet and hypercholesterolemia, the population would have to be divided into groups that share the abovementioned characteristics: First female and male, then risk factors.
References
Methods of sampling from a population | Health Knowledge. (n.d.). https://www.healthknowledge.org.uk/public-health-textbook/research-methods/1a-epidemiology/methods-of-sampling-populationLinks to an external site.
Simply Psychology. (2023, July 31). Stratified Random Sampling: Definition, Method & Examples. https://www.simplypsychology.org/stratified-random-sampling.htmlLinks to an external site.
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