Correlation & CausationWhat a correlation coefficient tells you, and the four things it might mean.Computingr runs from −1 to +1. Zero means no LINEAR relationship — not norelationship.Reading r±0.9 to 1.0 – very strong±0.7 to 0.9 – strong±0.4 to 0.7 – moderate±0.1 to 0.4 – weak0 – no linear relationshipIf A correlates with BA causes BB causes AC causes both — confoundingCoincidence, especially in small samplesWatch forSelection bias in who was measuredSimpson's paradox — reversal within subgroupsA curved relationship that r reports as zeroMultiple comparisons finding something by chanceAnscombe's quartet: four datasets with identical means, variances andr, and completely different shapes. Plot the data.Correlation & Causationlearnposters.com
Correlation & Causation — printable computing wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Correlation & Causation poster

13 entries in 3 groups.

r runs from −1 to +1. Zero means no LINEAR relationship — not no relationship.

Anscombe's quartet: four datasets with identical means, variances and r, and completely different shapes. Plot the data.

Questions about the Correlation & Causation poster

What’s on the Correlation & Causation (Data) poster?
13 entries in 3 groups. r runs from −1 to +1. Zero means no LINEAR relationship — not no relationship. Reading r: ±0.9 to 1.0 – very strong, ±0.7 to 0.9 – strong, ±0.4 to 0.7 – moderate, ±…; If A correlates with B: A causes B, B causes A, C causes both — confounding, Coincide…; Watch for: Selection bias in who was measured, Simpson's paradox — reversal within su…. Anscombe's quartet: four datasets with identical means, variances and r, and completely different shapes. Plot the data.
Who is the Correlation & Causation (Data) poster for?
Correlation & Causation (Data) belongs to the Computing section rather than to a school year, because computing is not something one grade owns. Anyone learning data can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Correlation & Causation (Data) poster?
Before claiming cause, name the mechanism. If you cannot, you have a pattern, not a finding. A wall chart earns its place by being glanceable from where the work is happening, so Correlation & Causation (Data) belongs on the wall where that computing work actually happens, within glancing distance, rather than filed away.
What other posters go with Correlation & Causation (Data)?
ACID, The CAP Theorem and Choosing a Chart sit alongside Correlation & Causation (Data) in the Computing section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.ACIDThe CAP TheoremChoosing a Chart
Is the Correlation & Causation (Data) poster free to download and print?
Yes. Correlation & Causation (Data) downloads as a free PDF with no account, no email and no watermark, like everything else in the Computing section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Correlation & Causation (Data) poster print at?
Correlation & Causation (Data) is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Correlation & Causation (Data) loses nothing.Printing guide

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