How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
Margin of error for mean
z*sd/sqrt(n)Margin of Error Calculator
Normal interval for a mean with known population SD and user-supplied z critical value.
Normal interval for a mean with known population SD and user-supplied z critical value.
Result
Enter your values and run the tool to see your result.