QiLing Tools📊Statistics & Probability Tools
Averages, regression, probability distributions, hypothesis tests, Bayes, normal tables, box plots, sample size and random simulation.
16 tools tagged "Statistics"
📊Statistics CalculatorFree online statistics calculator: paste a data set for the mean, median, mode, range, quartiles, variance, standard deviation, standard error and outliers.🎯CombinationsFree online combination and permutation calculator: exact C(n,r), P(n,r) and n! with big integers, plus repetition variants and the total number of subsets.🎲Random NumbersFree online random number generator: integers or decimals in any range, with no-repeats and sorting, list shuffling and dice, from a cryptographic source.🎰Probability DistributionsFree online probability calculator: z-scores and cumulative normal probabilities, P(X=k) and P(X≤k) for binomial and Poisson, plus the mean and variance.⚖️Average CalculatorFree online average calculator: arithmetic mean, median, mode, geometric and harmonic mean and RMS in one pass, plus weighted averages for grades and GPAs.📉Linear RegressionFree online linear regression and curve fitting: paste x and y columns for the least-squares line, r, R², residuals, predictions and quadratic or cubic fits.📊Chart MakerFree online chart maker: paste data from Excel or CSV to build bar, line, area, pie, donut and scatter charts, then download a 2× PNG or an editable SVG.🎲Probability SimulatorFree online probability simulator: coin flips, d4-d20 dice, weighted spinners and urn draws over a million trials, with live histograms and a chi-square test.🔬Confidence Intervals & TestsFree online statistical inference: confidence intervals for means and proportions, one- and two-sample tests with the statistic, df, p-value and decision.🎲Bayes’ TheoremFree online Bayes calculator: enter a prior and likelihood (or prevalence, sensitivity, specificity) for the posterior, PPV, NPV and a natural frequency table.🗳️Box Plot MakerBox and whisker plots from pasted columns: Tukey, TI-84, Excel INC/EXC or Minitab quartiles, 1.5×IQR and 3×IQR outliers, mean, notches, PNG/SVG export.⛰️Standard Normal Table (Z Table)Interactive z table with left, right, mean-to-z and central areas, shaded charts and inverse lookup, plus t, chi-square and F critical value tables.👥Sample Size & Power CalculatorSample size and power: survey proportions and means, two proportions, two-sample and paired t-tests (matches G*Power), A/B test size and duration.🐸Markov Chain CalculatorEnter a transition matrix with exact fractions to get the state diagram, n-step matrix Pⁿ, stationary distribution, classification and absorbing-chain results.🎳Central Limit Theorem SimulatorProbability simulations: an animated Galton board vs binomial and normal curves, the central limit theorem, law of large numbers and Monte Carlo π.🥧Chi-Square & ANOVA CalculatorChi-square goodness of fit and independence (Yates, Fisher exact, Cramér’s V), one-way and two-way ANOVA, Tukey HSD, Kruskal–Wallis and Levene’s test.