Statistics and plotting, right in your browser Paste from Excel, or open a CSV, Excel, OpenDocument, XML or JSON file. Mark the columns you are curious about and cstat picks a chart; the Stat menu has the classic analyses: descriptive statistics, t-tests, ANOVA, regression, control charts, capability, reliability and more. Nothing is uploaded.
…or explore a sample data set:
Piston ring diameters 25 subgroups of 5 ring diameters (mm) from three operators over two shifts; the process drifts near the end. Try: Xbar-R chart, capability (LSL 73.97, USL 74.03), ANOVA by operator Bearing life test 60 bearings from two suppliers run to failure under three loads; tests stopped at 2500 h (censored). Try: Distribution identification, Weibull analysis, Kaplan–Meier, 2-sample comparison Fertilizer field trial Yield of three crop varieties under four fertilizers, four plots each (balanced two-factor design). Try: Two-way ANOVA, interaction plot, main effects plot, Tukey comparisons Flower measurements Sepal and petal sizes of 150 flowers from three species (simulated after Fisher’s iris data). Try: 3D scatter, matrix plot, principal components, k-means clustering Car fuel consumption 120 cars: weight, engine power and size, cylinders, origin and fuel consumption. Try: Multiple regression, scatter with fit, correlation heatmap, box plot by origin Response surface A 41 × 41 grid of a smooth surface with hills and valleys (the classic “peaks” function). Try: 3D surface, 3D wireframe, contour plot Monthly sales Six years of monthly sales with growth and a strong seasonal pattern, for two regions. Try: Time series plot, decomposition, Winters’ method, autocorrelation Customer complaints 400 complaints by type, region, channel and severity. Try: Pareto chart, bar chart, cross tabulation and chi-square test Blood pressure trial 40 patients: systolic pressure before and after 8 weeks on a drug or placebo. Try: Paired t, 2-sample t, Mann–Whitney, individual value plot Gage R&R study 10 parts measured three times each by three operators (crossed design). Try: Gage R&R (crossed, ANOVA method), tolerance 0.6 Inspection lots 30 lots of varying size with the number of defective units and total defects found. Try: P chart, U chart, NP and C charts 2³ factorial experiment Yield from a replicated two-level design in temperature, pressure and catalyst (16 runs). Try: Analyze factorial design: effects, Pareto of effects, normal plot of effects