# Difference in Means Calculator

The Difference in Means calculator allows you to test for a statistically significant difference between two population means drawn from independent samples. The means are assumed to come from normally distributed samples of distinct populations with equal variances.

Typical uses of a T-test for two independent samples might include testing for differences in test scores among students in two separate classrooms or the average response to a given stimulus for two study groups.

To determine if the difference is significant follow these steps:

1. Plug in the means that you wish to test.
2. Plug in the sample size for each of the independent groups.
3. Enter the standard deviation of each group.
4. Select a confidence level.
5. Click on Calculate.
 Population Mean 1 Mean from Population #1. Sample Size 1 Total number of respondents from Population #1. Standard Deviation 1 Standard Deviation from Population #1. Population Mean 2 Mean from Population #2. Sample Size 2 Total number of respondents from Population #2. Standard Deviation 2 Standard Deviation from Population #2. Confidence Level (choose one) 99 95 90 80 % Answer: