Confidence Interval for Difference of Means Calculator

Determine the range within which the true difference between two population means is likely to lie, based on sample data.

Input Values

Enter the required values to calculate the confidence interval for the difference of means.

Sample 1 Mean (M₁)

Sample 2 Mean (M₂)

Standard Error of Difference

Confidence Level (%)

Degrees of Freedom (df)

Results

Lower Bound:

Upper Bound:

Understanding Confidence Interval for Difference of Means

A confidence interval for the difference of means estimates the difference between the average values of two groups in a population. It's often used when comparing the outcomes of two different treatments or groups.

For example, if we want to know the difference in average test scores between students taught by two different methods, we can use this tool. The confidence interval provides a range of values within which we are confident the true difference lies. A 95% confidence level means that if we repeat the sampling process many times, 95% of the calculated confidence intervals would contain the true difference in population means.

This calculator is useful in various fields like healthcare, social sciences, and engineering to compare the means of two independent groups.