Sample Size Calculator
This Sample Size Calculator helps you determine the minimum sample size needed for a statistical analysis based on a confidence level, margin of error, and population size. It ensures the results of your study are statistically significant and reliable.
Sample Size Calculator
Calculation Result
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What is a Sample Size Calculator?
A sample size calculator is a tool used to determine the ideal sample size required for a study or survey. By considering the desired confidence level, margin of error, and population size, the calculator helps you ensure your results are statistically significant.
How to Use a Sample Size Calculator Website?
To use the sample size calculator, simply enter your confidence level, margin of error, and population size into the respective fields. Click "Calculate" to get the recommended sample size for your study.
Formula of Sample Size Calculator
The formula to calculate the sample size is:
n = (Z^2 * p * (1-p)) / E^2
Where:
- n = sample size
- Z = Z-score (based on confidence level)
- p = estimated proportion (use 0.5 if unknown)
- E = margin of error
Advantages and Disadvantages of Using a Sample Size Calculator
Advantages:
- Helps in determining the right sample size for accurate results.
- Saves time and effort in manual calculations.
- Ensures statistical validity and confidence in the results.
Disadvantages:
- Requires accurate input for confidence level, margin of error, and population size.
- Assumes a normal distribution of the population, which may not always be the case.