P22StatisticsIntermediateInterpret12 min
Interpret a Confidence Interval
Interpret a confidence interval without claiming it gives the probability of a fixed parameter.
#confidence-interval#uncertainty#sampling
Scenario
A survey estimates average delivery satisfaction at 7.4 with a 95% confidence interval of 7.1 to 7.7.
Problem statement
Explain the interval to a non-technical stakeholder and name two factors that affect its width.
Your Task
- Use a repeated-sampling interpretation.
- Avoid saying there is a 95% chance the fixed mean is inside this specific interval.
- Discuss sample size and variation.
Related Concepts
Sampling errorSample sizeSurvey bias
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