Confidence Interval Calculator
Confidence Interval Calculator – Find the Confidence Range for a Population Mean
Accurately Estimate Population Mean with Confidence!
Our Confidence Interval Calculator helps you determine the range within which the true population mean (μ) lies based on a given sample. By entering your sample statistics and selecting a confidence level, you can obtain accurate results with lower bound, upper bound, and margin of error (E).
How to Use the Confidence Interval Calculator?
- Enter Sample Mean (x̄) – The average value from your sample.
- Enter Sample Size (n) – The total number of observations in the sample.
- Enter Standard Deviation (s) – The standard deviation of the sample data.
- Select Confidence Level – Choose a confidence level (e.g., 90%, 95%, 99%). Default is 99.9%. You need to choose other then default.
- Click "Calculate" – Instantly get your confidence interval.
Why Use a Confidence Interval Calculator?
✅ Accurate & Reliable – Uses statistical formulas to ensure precision.
✅ Supports Multiple Confidence Levels – Choose the confidence level that best fits your study.
✅ Essential for Research & Data Analysis – Used in statistics, business analysis, science, and medical research.
✅ Gives Clear Results – Provides lower bound, upper bound, and margin of error (E).
Understanding Your Confidence Interval Calculation:
🔹 Example Calculation:
- Sample Mean (x̄) = 12
- Confidence Level = 99%
- Result: [0.72, 23.28]
- Interpretation: You can be 99% confident that the population mean (μ) falls between 0.72 and 23.28.
🔹 Key Terms:
- Lower Bound – The minimum expected population mean.
- Upper Bound – The maximum expected population mean.
- Margin of Error (E) – The range within which the true mean is likely to fall.
Start Calculating Confidence Intervals Now!
Use our free Confidence Interval Calculator for accurate statistical analysis. Try it now and get reliable confidence intervals instantly!
