Statistical test calculators

The statistical test calculators provide more than just the simple results, the calculators check the tests' assumptions, calculate test powers and interpret the results. The online calculators support not only the test statistic and the p-value but more results like effect size, test power, and the normality level. If one of the validations fails the tool recommends a solution.
Choose statistical test (decision tree). What statistical test should I use? What regression type should I use?

Test calculators

TestAssumptionsRequired sample data
#Test nameCheckStatisticNormal DistributionIndσσ12dμ/px̄/p̂;nSdata
1One Sample Z-TestMeanZ statistic
2One Sample T-TestMeanT statistic
3Two Sample Z-TestMeanZ statistic
4Two Sample T-Test (Pooled variance)MeanT statistic
5Two Sample T-Test (Welch's)MeanT statistic
6Two Sample Mann-Whitney U TestRankU statistic
7Paired T-TestMeanT statisticPaired
8Paired Wilcoxon Sign Rank TestRankT statisticPaired
9One Way ANOVA TestMeanF statistic
10Kruskal-Wallis TestMeanF statistic
11Two Way ANOVA Test
Fixed model, Mixed model, Random mode, Mixed model with repeats
MeanF statistic
12One Sample Proportion TestProportionZ statisticBinomial
13Two Sample Proportion TestProportionZ statisticBinomial
14Chi-Squared Test For Varianceσchi-squared statistic
15F Test For VariancesσF statistic
16Levene's Test For VariancesσF statistic
17Chi-Squared Test For Goodness Of Fit
(McNemar test, Chi-squared test for association, Fisher test, Binomial test)
Fitchi squared statistic
18Shapiro-Wilk TestFitw statistic
19Kaplan Meier Survival AnalysisSurvivalw statistic
** - yes, - no, empty - irrelevant

Regression calculators

#RegressionStatistic
1Simple Linear RegressionRegression F statistic
2Multiple Linear RegressionRegression F statistic
3*Bulk Linear RegressionRegression F statistic
4Binary Logistic Regressionχ2 = 2(LL1-LL0)
5Multinomial Logistic Regressionχ2 = 2(LL1-LL0)
*Bulk linear regression calculator for several dependent variables with the same predictors.

Statistical Power and Sample Size calculators

Distribution calculators

Statistical tables

Measurements calculators

#MeasurementImage
1Mean Median Mode (Q1, Q3, IRQ, Range)mean
2Standard Deviation (Variance, Mean, SEM, MAD)Standard deviation
3Average (Sum, Count)
5Probability (Probability formula, Dependent events, Bayes' Theorem, Independent events)P
4Combinations calculator (Combinations calculator, Permutation calculator, Repetitions)
4Correlation calculator (Pearson correlation, Spearman's rank correlation)
4Outliers (Tukey's Fences (Boxplot), Z-Score)

Chart makers

Goal

The goal of this website is to make statistics accessible to anyone, converting complex statistical jargon into common everyday language.
The calculators also provide R codes for your convenience.
We started adding a step by step work-through for education purposes.

Terms

We put in a lot of effort to provide accurate results and we automatically test every new page.
We usually compare the results to the R results.
The information and tools in this website are given AS IS WITHOUT ANY WARRANTY OF ANY KIND.