General plots / Box plot
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Each box summarises one group: the line is the median, the box spans the 25th–75th percentiles (interquartile range, IQR) and whiskers reach the furthest value within 1.5 × IQR; points beyond are outliers.
With up to 300 values the raw points are overlaid automatically, showing sample size and spread.
Brackets show stars for the adjusted P value: * < 0.05, ** < 0.01, *** < 0.001, ns = not significant. Two groups use the Welch t test or Mann–Whitney U test; more groups use ANOVA with Tukey or Kruskal–Wallis with Dunn (BH-adjusted).
Box plots hide distribution shape such as bimodality; use a violin or raincloud plot to see the shape.
Boxes span the quartiles (Q1–Q3, R type 7) and whiskers reach the furthest value within 1.5 × IQR; densities use a Gaussian kernel (Silverman bandwidth). Tests: Welch t test, Mann–Whitney U (as scipy), one-way ANOVA with Tukey HSD, Kruskal–Wallis with Dunn’s test (Dunn 1964, Technometrics 6:241–252); multiple comparisons are adjusted by Benjamini–Hochberg.
Up to 40 groups; at most 10 comparison brackets are drawn (smallest P first); all comparisons are in the downloadable table.
Send us your data and research question and you will receive a written plan within 1 working day: analysis steps, parameter rationale, deliverables and timeline. Quoted per project.