# 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.

## Test calculators

TestAssumptionsRequired sample data
#Test nameCheckStatistic Indσσ12dμ/px/p̂nS 1One Sample Z-TestMean 2One Sample T-TestMean 3Two Sample Z-TestMean 4Two Sample T-Test (Pooled variance)Mean 5Two Sample T-Test (Welch's)Mean 6Two Sample Mann-Whitney U TestRank 7Paired T-TestMean Paired
8Paired Wilcoxon Sign Rank TestRank Paired
9One Way ANOVA TestMean 10Kruskal-Wallis TestMean 11One Sample Proportion TestProportion Binomial
12Two Sample Proportion TestProportion Binomial
13Chi-Squared Test For Varianceσ 14F Test For Variancesσ 15Levene's Test For Variancesσ 16Chi-Squared Test For Goodness Of Fit
(McNemar test, Chi-squared test for association, Fisher test, Binomial test)
Fit 17Shapiro-Wilk TestFit 18Kaplan Meier Survival AnalysisSurvival ** - yes, - no, empty - irrelevant

## Regression calculators

#RegressionStatistic
1Simple Linear Regression 2Multiple Linear Regression 3*Bulk Linear Regression 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

#CalculatorImage
1Sample size 2Test power 2Confidence interval ## Distribution calculators

#DistributionImage
1P-value 2Distributions 2Normal Distribution 2Binomial Distribution 3T Distribution (Student's) 4Chi-Squared Distribution 5F Distribution (Fisher-Snedecor) ## Measurements calculators

#MeasurementImage
1Mean Median Mode 2Standard Deviation 3Average
4Outliers
5ProbabilityP

## Chart makers

#MeasurementImage
1Histogram maker ### 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.