Question 1

What is an independent samples t-test?

Accepted Answer

An independent samples t-test compares the means of two independent groups to determine if there is a statistically significant difference between them. It is used when you have two separate groups of participants.

Question 2

How do I enter my data?

Accepted Answer

Enter your raw data values separated by commas, spaces, or new lines in each group's text box. The calculator will automatically compute the mean, standard deviation and sample size for each group.

Question 3

What does the p-value mean in a t-test?

Accepted Answer

The p-value tells you the probability of seeing the observed difference (or a more extreme one) if the null hypothesis (no difference between groups) were true. If p ≤ 0.05, the difference is statistically significant.

Question 4

Is this t-test calculator free?

Accepted Answer

Yes, this tool is completely free and runs entirely in your browser. No data is uploaded — all calculations are done locally for maximum privacy.