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Статистика

Statistics Calculators & Research Tools

Analyze data with 31 focused statistics and research tools. Supported calculations run locally in your browser and report effect sizes, confidence intervals and interpretation cues where appropriate.

Venn Diagram Generator Histogram Maker Linear Regression Calculator Pearson Correlation Calculator Mann–Whitney U Test Calculator Chi-Square Test Calculator One-Way ANOVA Calculator Independent / Welch’s T-Test Calculator P-Value Calculator Statistical Power Calculator

32 Статистика и исследовательские инструменты

Анализируйте выборки, доверительные интервалы, статистические гипотезы, размеры эффекта, регрессию, распределения и исследовательские графики локально в браузере.

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Randomness Lab – Dice, Coin & Random Integer

Run visual probability experiments with up to 20 dice, up to 20 coin flips with outcome percentages, or a random integer between two bounds. Results are generated locally in your browser.

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Venn Diagram Generator

Build a 2-set or 3-set Venn diagram from item lists and calculate unique regions, intersections and union size.

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Scatter Plot + Regression Maker

Create a scatter plot with least-squares regression line and report equation, r, r² and p-value.

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Box Plot Maker

Create a box-and-whisker plot with five-number summary, IQR fences and detected outliers.

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Histogram Maker

Create a responsive histogram from numeric data using Sturges, square-root, Freedman–Diaconis or a custom bin count.

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Poisson Distribution Calculator

Calculate exact, cumulative and upper-tail Poisson probabilities from an expected event rate lambda.

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Binomial Distribution Calculator

Calculate exact, cumulative and upper-tail binomial probabilities plus mean and standard deviation.

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Normal Distribution Calculator

Calculate normal-distribution probabilities between bounds, lower/upper tails and standardized z values.

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Linear Regression Calculator

Fit a simple least-squares linear regression and report slope, intercept, r, r², slope CI, standard error and p-value.

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Spearman Correlation Calculator

Calculate Spearman rank correlation (rho) and an approximate significance test from paired observations.

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Pearson Correlation Calculator

Calculate Pearson’s r, r², covariance, t statistic and two-sided p-value from paired X/Y data.

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Kruskal–Wallis Test Calculator

Compare three or more independent groups with the Kruskal–Wallis test and report epsilon-squared effect size.

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Wilcoxon Signed-Rank Calculator

Compare paired observations with the Wilcoxon signed-rank test and report rank sums, z approximation and effect size r.

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Mann–Whitney U Test Calculator

Compare two independent groups with the Mann–Whitney U test using ranked observations and a tie-corrected normal approximation.

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Fisher’s Exact Test Calculator

Run a two-sided Fisher’s exact test for a 2×2 table with odds ratio and an approximate 95% odds-ratio interval.

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Chi-Square Test Calculator

Run a chi-square test of independence from a contingency table and report expected counts and Cramér’s V.

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Two-Way ANOVA Calculator

Run a balanced two-way ANOVA with replication and report main effects, interaction, p-values and partial eta squared.

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One-Way ANOVA Calculator

Run one-way ANOVA for two or more groups and report F, p-value, eta squared and omega squared.

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Paired T-Test Calculator

Run a paired t-test on matched observations with paired mean difference, confidence interval and standardized effect size.

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Independent / Welch’s T-Test Calculator

Compare two independent groups with Welch’s t-test by default or the pooled-variance t-test, reporting CI and effect sizes.

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One-Sample T-Test Calculator

Run a two-sided one-sample t-test with mean difference, 95% confidence interval and Cohen’s d.

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P-Value Calculator

Calculate p-values from z, t, chi-square or F statistics with appropriate tail choices.

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Statistical Power Calculator

Estimate one-sample or two-sample power from standardized effect size, sample size and alpha using a transparent normal approximation.

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Sample Size Calculator

Estimate minimum sample size for a proportion or mean from confidence level, margin of error and expected variability.

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Margin of Error Calculator

Calculate margin of error for a mean or proportion at a chosen confidence level.

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Confidence Interval Calculator

Calculate a t-based confidence interval for a sample mean or a Wilson confidence interval for a proportion.

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Outlier Calculator

Find possible outliers with the Tukey 1.5×IQR rule and report quartiles and lower/upper fences.

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Percentile / Quartile / IQR Calculator

Calculate a requested percentile together with Q1, median, Q3 and interquartile range from sample data.

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Z-Score Calculator

Calculate a z-score from a value, mean and standard deviation and view cumulative and upper-tail normal probabilities.

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Standard Deviation & Variance Calculator

Calculate sample or population variance and standard deviation, plus mean and coefficient of variation.

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Mean / Median / Mode Calculator

Calculate arithmetic mean, median and mode from a list of numbers, with count and range.

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Descriptive Statistics Calculator

Calculate count, mean, median, mode, quartiles, variance, standard deviation, standard error, CV, skewness and kurtosis from a numeric sample.

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Часто задаваемые вопросы

Which statistical tests and calculators are included?

The collection includes descriptive statistics, confidence intervals, sample size and power, t-tests, ANOVA, chi-square and Fisher tests, nonparametric tests, correlation, regression, probability distributions and research plots.

Do these tools upload my dataset?

No. The statistics tools in this collection process entered values locally with JavaScript in your browser.

Can a p-value alone determine scientific importance?

No. Interpret p-values with effect sizes, uncertainty, study design, assumptions, multiplicity and subject-matter context.

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Free statistics calculators for descriptive statistics, confidence intervals, sample size, statistical power, p-values, t-tests, ANOVA, chi-square, nonparametric tests, correlation, regression and research plots.

Statistical output is a calculation and interpretation aid. Check study design, assumptions, sampling, multiplicity, missing-data handling and domain-specific reporting standards before drawing scientific conclusions.