• “ Since 1999 - over 4 million member respondents on 24 pre-classified online survey panels from   and more than 40 countries ”

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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:
  • Plug in the means that you wish to test.
  • Plug in the sample size for each of the independent groups.
  • Enter the standard deviation of each group.
  • Select a confidence level.
  • 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)
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