---
url: "https://questionstar.com/principles-of-survey-research/chapter-5/slide-209.html"
title: "Types of Relationships between Two Variables"
type: "lehrbuch-slide"
chapter: 5
chapterTitle: "Data Analysis: A Concise Overview of Statistical Techniques"
slide: 209
---

# Types of Relationships between Two Variables

*Unless the data come from a controlled experiment, we can only claim the existence of a relationship between the variables — but not the causal direction…*

Unless the data come from a controlled experiment, we can only claim the **existence** of a relationship between the variables — but not the **causal direction** of that relationship.

Linear

Linear

Non-linear

No relationship

*[Diagramm: Types of Relationships between Two Variables]*

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*Slide 209 of 274 · Chapter 5: Data Analysis: A Concise Overview of Statistical Techniques · Principles of Survey Research · Dr. Paul Marx*