In a health study involving a large population of patients, the researcher selects a sample size of 300 based on Cochran's formula for a 95% confidence level. What does the confide... In a health study involving a large population of patients, the researcher selects a sample size of 300 based on Cochran's formula for a 95% confidence level. What does the confidence level indicate?
Understand the Problem
The question is asking about the interpretation of a 95% confidence level in the context of a sample size determined for a health study using Cochran's formula. It aims to clarify what this confidence level signifies regarding data accuracy, representation, and error margin.
Answer
There is a 95% chance that the sample accurately reflects the population parameter.
The final answer is that there is a 95% chance that the sample accurately reflects the population parameter.
Answer for screen readers
The final answer is that there is a 95% chance that the sample accurately reflects the population parameter.
More Information
In statistics, a 95% confidence level indicates that if the same population were sampled multiple times, approximately 95% of the confidence intervals calculated would contain the true population parameter.
Tips
Common mistakes include confusing confidence level with accuracy or margin of error. They refer to the likelihood that the population parameter falls within a specific range.
Sources
- Sample Size Calculator - Qualtrics - qualtrics.com
- Sample Size Calculator - Calculator.net - calculator.net
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