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Sample Size

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May 1, 2024 3 minute read

What is sample size?

Sample size refers to the number of individuals or data points selected from a larger population to represent the entire population for research purposes. The primary goal of determining the appropriate sample size is to obtain a sample that accurately reflects the characteristics of the larger population, ensuring that the results obtained from the sample can be generalized to the entire population.

Why is sample size important?

Sample size plays a crucial role in research as it directly impacts the validity and reliability of the findings. An appropriately sized sample helps researchers draw accurate conclusions about the population, while an inadequate sample size can lead to biased or inaccurate results.

There are several reasons why sample size is important:

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Reading list

We've selected three books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Sample Size.
Provides a comprehensive overview of sampling methods used in survey research. It covers both probability and non-probability sampling methods, and discusses the strengths and weaknesses of each method.
Provides tables for determining the appropriate sample size for clinical studies. It covers a wide range of study designs and statistical tests, making it a useful resource for researchers in clinical research.
Provides a concise and accessible overview of sampling theory and methods. It good starting point for researchers who are new to the topic of sample size determination.
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