Two Sample T-Test Calculator

Two sample t-test is used to check whether the means of two groups are significantly different from each other. For example, if you want to see if mean weight of males and females have statistically significant difference between them.

Independent T-test assumes that the two samples have equal variances. Welch's t-test is used if you have unequal variances.

Either enter raw data or summary information to calculate two sample t-test. You can directly paste data from MS Excel.

Enter Raw Data

Enter Summary Data

Sample1 mean ($ \bar{x}_{1} $) Sample1 Standard Deviation ($ s_{1} $) Sample1 Size ($ n_{1} $) Sample2 mean ($ \bar{x}_{2} $) Sample2 Standard Deviation ($ s_{2} $) Sample2 Size ($ n_{2} $)

Result

Assumptions of Two Sample t-test

Scores are normally distributed within each of the two groups
Each score is sampled independently and randomly.
Data must be continuous