Start in 3 steps
Pick one goal first: compare groups, run simulations, or plot data.
Open one topic card below and run one calculator.
Return here when your task changes.
If you are new to statistics, start with one small question and one dataset. Run one tool, read the result, then move to the next step.
Pick a focus
Inference & tests
Confidence intervals, hypothesis tests, regression, and uncertainty.
Probability & simulation
Combinatorics, distributions, simulations, and probability trees.
Data visualization
Quick charts, histograms, box plots, and regression.
This guide helps you pick the right topic quickly.
Quick guide
- Need confidence intervals or tests? Start with Inference & tests.
- Need simulation or combinatorics? Start with Probability & simulation.
- Need charts and summaries? Start with Data visualization.
Recommended (top 3)
If you are unsure where to start, these cover most “stats & probability” tasks.
Tools
- Quick charts from pasted data — scatter / box plot.
Paste spreadsheet data to generate scatter and box plots instantly.
- Distribution Sampler and Histogram Tool.
Generate random samples from common distributions, visualize histograms, review summary stats, and export CSV/JSON.
- Permutation test – exact p-value for A/B and paired.
Run a permutation (randomization) test for two independent groups or paired samples.
Calculators
- Error Propagation Calculator with Steps.
Propagate uncertainty for sums, products, powers, and custom formulas with gradient×covariance steps, correlation.
- Hypergeometric probability calculator without replacement.
Calculate hypergeometric probabilities without replacement, including P(X=10) for N=60, K=35, n=15.
- nCr & nPr calculator (permutations & combinations).
Compute nCr (combinations), nPr (permutations), and factorial (n!).
- Normal Distribution Calculator.
Calculate normal probabilities, z-scores, percentiles, and inverse cutoffs from the mean and standard deviation.
- Probability Simulator — coin, dice, roulette.
Simulate coin tosses, dice rolls and roulette spins with a fixed seed to compare theoretical and empirical.
- Probability tree & 2×2 table — AND/OR & complement.
Probability tree & 2×2 table tool for AND/OR/NOT and complements.
- Birthday paradox (collision probability) calculator.
Calculate the birthday paradox collision probability with exact math + a Monte Carlo simulator.
- Coupon Collector Calculator (Expected Draws & Completion).
Solve the coupon collector problem with expected draws n·H_n, completion probability P(T≤t), and t50/t90/t99.
- Distributions — binomial, Poisson, t, chi square.
Compute PMF or PDF, CDF, quantiles, and exact intervals for binomial, Poisson, Student t, and chi-square.
- Linear Regression & Correlation — Scatter, OLS/WLS, R².
Paste x,y[,w] data or upload a CSV to fit OLS, WLS or Theil–Sen regression.
- Histogram & cumulative frequency from grouped data.
Enter grouped or raw data to build a derived frequency table, histogram (frequency or frequency density).
- Descriptive Statistics + Box Plot & Histogram.
Paste a dataset or upload CSV/TSV to review descriptive statistics, histogram, box plot, outlier counts, trimmed mean.
- Confidence Interval & Hypothesis Test Wizard.
Build confidence intervals and hypothesis tests for means and proportions with t/z workflows, Welch, paired, Wilson.
Related hubs
- Statistics (inference & tests) | CalcBEInference tools for confidence intervals, hypothesis tests, regression, and uncertainty. Browser-only, no sign-in.
- Probability & simulation tools | CalcBEProbability simulators and calculators for expected value, trees, combinatorics, distributions, and Monte Carlo intuition. Browser-only, no sign-in.
- Data visualization calculators | CalcBEMove here when the next task is plotting a dataset, checking distributions, or turning summary values into charts.