Confidence Interval Calculator

Calculate confidence intervals for population means and proportions with detailed step-by-step solutions.

Enter Sample Data

Select test type and enter values

Test Type
Confidence Level
%
Sample Mean (x̄)
Sample Size (n)
Sample Proportion (p̂)
%
Sample Size (n)
Confidence Interval
[, ]
Margin of Error
Critical Value

Enter sample data above and tap Calculate Interval.

Step-by-step Solution