In this episode of the Total Survey Design Podcast, we explore the fascinating concept of sample size and its impact on survey accuracy. Discover why just about 1000 responses can represent the views of millions, debunking common misconceptions about survey sampling. We'll dive into the key parameters for calculating sample size, such as margin of error, confidence level, predicted variance, and target population size. Learn how a small, well-chosen sample can provide precise and reliable data, making large-scale surveys both practical and cost-effective. Tune in to understand the math behind the magic!

Here's a general formula commonly used for calculating sample size for simple random sampling:

𝑛=𝑍^2*𝑃*(1−𝑃)/𝐸^2

Where:
𝑛 = required sample size
𝑍 = Z-value (the number of standard deviations from the mean corresponding to the desired confidence level)
For a 95% confidence level, 𝑍≈1.96
𝑃 = estimated proportion of the population (if unknown, 𝑃 is often assumed to be 0.5 to maximize the sample size)
𝐸 = margin of error (the desired level of precision, expressed as a decimal)

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In this episode, hosts Seon Yup Lee and Azdren Coma explore the ways surveys can mislead us, inspired by the book "How to Lie with Maps." They discuss common survey pitfalls, from bad question design to poor sampling, and provide real-world examples, such as misleading questions in political surveys and biased sampling in product ratings. This episode, the first in a series, aims to uncover the frequent errors in surveys that can skew data, whether by accident or intention. Tune in to learn how to spot and avoid these issues in your own survey designs.

Find us online at: instagram.com/totalsurveydesign/
Contact us at: totalsurveydesign@gmail.com

In this episode of the Total Survey Design Podcast, Seon Yup and Azdren dive into the utility of surveys and their vital role in understanding public opinion and decision-making. They share examples, like A&W's marketing mishap with their third-pound burger, and the importance of surveys in evaluating high-cost programs. From business insights to educational improvements, surveys offer invaluable data that can guide better choices and avoid costly mistakes. Tune in to learn why surveys matter and how they can transform various aspects of life and work.

"Kalimba Relaxation Music" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

A special thank you to Don Coma.

Find us online at: instagram.com/totalsurveydesign/
Contact us at: totalsurveydesign@gmail.com