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Discussion Question # 2 W2 Nursing Assignment Help

August 27, 2023

Explain each sampling technique discussed in the “Visual Learner: Statistics” in your own words, and give examples of when each technique would be appropriate.

I NEED YOU TO ANSWER THIS DISCUSSION QUESTION, 350 TO 500 WORDS NEEDED, 3 REFERENCES AND PLEASE IF YOU CAN DO IT IN APA FORMAT

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Introduction:
Sampling techniques are used in statistics to gather data from a larger population. These techniques help to select a representative sample that can accurately reflect the characteristics of the entire population. In the “Visual Learner: Statistics”, several sampling techniques are discussed, and in this answer, we will explain each technique in our own words and provide examples of situations where each technique would be appropriate.

1. Simple Random Sampling:
Simple random sampling is a technique where each member of the population has an equal chance of being selected for the sample. It is like drawing names out of a hat, where every name has the same probability of being chosen. This technique allows for unbiased representation of the population and minimizes selection bias. Simple random sampling is appropriate when the population is homogenous, and there is no inherent structure or grouping within it. For example, if a researcher wants to estimate the average height of adults in a country, they can use simple random sampling by assigning a unique number to each adult in the country and then randomly selecting a certain number of individuals to measure their height.

2. Stratified Sampling:
Stratified sampling involves dividing the population into subgroups or strata and then randomly selecting samples from each stratum. The goal is to ensure that the sample represents the characteristics of each subgroup in the same proportion as they occur in the population. This technique is useful when there are significant differences within the population that may impact the research outcome. For instance, if a researcher wants to study the prevalence of diabetes in a city with varying income levels, they can divide the population into low-income, middle-income, and high-income strata. They can then randomly select individuals from each stratum in proportion to their representation in the overall population.

3. Systematic Sampling:
Systematic sampling involves selecting every “kth” element from the population after randomly choosing the starting point. It is similar to simple random sampling, but the selection is made at regular intervals. This technique is useful when it is difficult to obtain a sampling frame or when the population is large and randomly choosing individuals is impractical. For example, if a researcher wants to survey customers entering a shopping mall, they can select every 10th customer entering the mall after randomly choosing a starting point. This ensures a systematic selection of participants and saves time compared to random selection.

4. Cluster Sampling:
Cluster sampling involves dividing a population into clusters or groups and randomly selecting entire clusters to include in the sample. This technique is particularly useful when it is time-consuming or expensive to reach individuals scattered throughout the population. For instance, if a researcher wants to estimate the prevalence of a certain disease in a country, they can divide the country into clusters (e.g., provinces or states) and randomly select a few clusters for data collection. Then, within each selected cluster, further sampling techniques such as simple random sampling can be used to obtain a subset of individuals.

In conclusion, sampling techniques play a crucial role in the collection of data for statistical analysis. Understanding the different techniques available and their appropriate use is essential to ensure valid and representative results. Simple random sampling, stratified sampling, systematic sampling, and cluster sampling each have their distinct advantages and are suitable for different research situations. Researchers should carefully consider the characteristics of their population and the research goals to select the most appropriate sampling technique for their study.

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