---
url: "https://questionstar.com/principles-of-survey-research/chapter-4/slide-138.html"
title: "A survey result — and how certain is it?"
type: "lehrbuch-slide"
chapter: 4
chapterTitle: "Sampling"
slide: 138
---

# A survey result — and how certain is it?

*name social media as their main information channel.*

“Which sources do you prefer for obtaining your information?” (n = 48,804)

Social media 32 %

Search engines 24 %

News apps & online portals 18 %

Television 12 %

Friends & acquaintances 9 %

Print (newspaper/magazine) 5 %

32 %

name **social media** as their main information channel.

But how close is this value to the true value in the population?

The answer is given by the **margin of error** — and it determines the required sample size.

---

*Slide 138 of 274 · Chapter 4: Sampling · Principles of Survey Research · Dr. Paul Marx*