Statistics Calculators

Descriptive Statistics Calculator Descriptive Statistics Calculator Calculate comprehensive descriptive statistics including measures of central tendency, variability, distribution shape, and position for your dataset. Data Input Input Method Manual EntryCSV FormatSpace Separated Choose how you want to enter your data Data Values Enter numeric values, one per line Decimal Precision 2 decimal places3 decimal places4 decimal … Read more

Process Capability Index Calculator Process Capability Index Calculator Calculate Cp, Cpk, Pp, and Ppk indices to assess your process capability and performance against specification limits. Process Parameters Process Type Bilateral (Two-sided limits)Unilateral (One-sided limit) Choose based on your specification requirements Process Mean (μ) Average value of your process measurements Process Standard Deviation (σ) Standard deviation … Read more

Linear Regression Calculator Linear Regression Calculator Fit a straight line y = a + b·x to your data. Paste X and Y values, then see slope, intercept, R², predictions, and a clean chart. Use example Clear Enter your data X values Use commas, spaces, or new lines. Y values Must be same length as X. … Read more

Hypothesis Testing Calculator Hypothesis Testing Calculator Test means and proportions with one-sample and two-sample options. Get test statistic (z or t), degrees of freedom, p-values, critical values, and decisions at your chosen α and tail. Use example Clear Enter your values Mean test Proportion test Type One-sampleTwo-sample Test z (known σ)t (unknown σ) Tail Two-tailedLeft-tailedRight-tailed … Read more

T-Statistic Calculator T-Statistic Calculator Compute the t-statistic, degrees of freedom, p-values, and critical t for one-sample and two-sample tests (Welch or pooled), and from correlation r. Use example Clear Enter your values One-sample Two-sample From correlation r Sample mean (x̄) Hypothesized mean (μ₀) Sample standard deviation (s) Sample size (n) Significance (α) Tail Two-tailedLeft-tailedRight-tailed Calculate … Read more

Exponential Regression Calculator eˣ Exponential Regression Calculator Fit an exponential model of the form y = a · e^(b·x) to your data. Paste your X and Y values, and get the best-fit curve, a and b, and the fit quality. Use example Clear Enter your data X values Use commas or spaces. Same length as … Read more

Degrees of Freedom Calculator Degrees of Freedom Calculator Calculate degrees of freedom for various statistical tests including t-tests, chi-square tests, ANOVA, and regression analysis. Input Parameters Statistical Test Type One-Sample t-testTwo-Sample t-testPaired t-testChi-Square Goodness of FitChi-Square Test of IndependenceOne-Way ANOVATwo-Way ANOVALinear RegressionCorrelation Test Choose the statistical test you’re performing Sample Size (n) Number of observations … Read more

Relative Error Calculator Relative Error Calculator Calculate relative error, absolute error, and percentage error to measure the accuracy of measurements and approximations. Input Values Calculation Type Calculate Relative ErrorFind True ValueFind Approximate Value Choose what you want to calculate True Value (Exact Value) The actual or theoretical correct value Approximate Value (Measured Value) The measured … Read more

Raw Score Calculator Raw Score Calculator Convert between raw scores and z-scores using population or sample statistics. Understand how individual data points relate to the distribution. Input Parameters Calculation Type Raw Score to Z-ScoreZ-Score to Raw Score Choose what you want to calculate Statistic Type Population (μ, σ)Sample (x̄, s) Population parameters or sample statistics … Read more