WebToolArcHow to read this chart
A frequency polygon connects class-midpoint frequencies from a binned numeric sample.
Before publishing
The bin rule changes the apparent shape. Review the observation count and range before comparing distributions.
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Chart Tools
Frequency Polygon Maker
Create frequency polygons from raw observations or grouped class frequencies, compare relative and cumulative views, and export the graph evidence.
SERP Competitor Displacement · Distribution Graph Authority
Frequency polygon workspace: raw data or grouped classes
Build the polygon from observations or an existing frequency table, inspect class midpoints and cumulative evidence, overlay an ogive, then export plot-ready coordinates, SVG, or CSV.
—Total frequency n
—Classes
—Modal class
—Mean / grouped estimate
Reviewing class structure…
| # | Class interval | Midpoint | Frequency | Relative | Cumulative | Cumulative % |
|---|
—
Preparing frequency polygon…
Interpretation boundary: a grouped frequency polygon plots each class midpoint against its frequency. Relative-frequency polygons have the same shape on a percentage scale. An ogive is different: it plots cumulative frequency against class boundaries, so this workspace labels that overlay separately instead of treating it as the same graph.
ReadyPoints are plotted at class midpoints.
Data readiness & publication review
Reviewing…Check the data before you export
Review the source structure, chart-specific interpretation risks and a copyable accessible summary. The chart itself remains the primary workspace above.
Findings
Accessible chart summary
Reviewing the current data…
This review checks structure and common interpretation risks; it does not prove that the source data, measurement method, denominator, units or conclusion are valid.
Frequency distribution table
Inspect the numbers behind the plotted line instead of trusting the chart image alone.
| Bin | Lower | Upper | Midpoint | Frequency | Relative | Cumulative | Cumulative % |
|---|
The table uses the same bin rule and bin count as the chart above.
Frequency Polygon Maker: Bins, Midpoints & Table
Inspect bin boundaries, class midpoints, frequencies and closure points behind the frequency polygon before exporting the chart.
Core data-to-chart workflows
Start with Graph Maker or CSV Chart Maker, then use a focused chart type when the visual question changes. Keep source data and export evidence connected instead of treating a rendered picture as the only record.
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