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How to read a chart that is trying to fool you
How to read a chart that is trying to fool you: this guide has a section for each trick, each drawing the very same data honestly and dishonestly side by…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
This guide has a section for each trick, each drawing the very same data honestly and dishonestly side by side: the truncated y-axis, the dual axis, a log scale mistaken for linear, area scaled by radius, the cherry-picked window, a rolling average that hides a jump, a bar chart of percentage change, a pie chart summing past 100, error bars with no stated definition, the box plot decoded, "up to" ranges, and a map that is really a map of where people live.
Fourteen pages, every chart rebuilt from open data so the reader can check it.
How to use it
Use How to read a chart that is trying to fool you as a structured learning path: begin with the vocabulary, follow the evidence map, and keep the uncertainty labels attached to claims as you compare sources.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | eksitav graafik näide |
| Finnish | harhaanjohtava kuvaaja esimerkki |
| Russian | как графики вводят в заблуждение примеры |
| English | misleading graph examples |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: own writing; all charts rebuilt from Eurostat and national statistics (open). · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
This guide owns the explanatory layer for the topic. Personal decisions, diagnoses, legal determinations and live availability remain with the relevant professional or official service.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Why it belongs on TempoLife
/data, /research.
Frequently asked questions
What does this guide cover?
This guide has a section for each trick, each drawing the very same data honestly and dishonestly side by side: the truncated y-axis, the dual axis, a log scale mistaken for linear, area scaled by radius, the cherry-picked window, a rolling average that hides a jump, a bar chart of percentage change, a pie chart summing past 100, error bars with no stated definition, the box plot decoded, "up to" ranges, and a map that is really a map of where people live. Fourteen pages, every chart rebuilt from open data so the…
What evidence does it use?
own writing; all charts rebuilt from Eurostat and national statistics (open).
Where does this guide stop?
It explains the topic and points to primary or official sources. It does not replace a qualified professional, an official decision, or advice based on your own circumstances.
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