Most calculators hand you a number and stop. Ours give the number and tell you what it means and how to report it, built by the statisticians behind our statistics help. Free to use, no sign-up.
Equation, slope, intercept, r and R squared from your X and Y data, with interpretation.
Turn a z or t statistic into a p-value, one or two tailed, and see if it is significant.
A confidence interval for a mean from summary stats or raw data, at any level.
Independent, paired or one-sample t-test with t, df, p-value and interpretation.
A calculator that returns "t = 2.31, p = .025" is only half an answer. The mark, and the understanding, comes from knowing what to do with it: which value is the statistic, which is the p-value, whether the result is significant, and how to write it in your report. Every tool here adds that layer, and links to a full SPSS walkthrough when your assignment needs the complete analysis.
When the data will not behave, an assumption fails, or the deadline is tight, a statistician can run the whole thing on your file and write the results. That is our statistics homework help service, and it is what these free tools are built alongside.
Send your data and a statistician runs the test, checks the assumptions, and writes the results before your deadline.
Get a free quote →