---
url: "https://questionstar.com/principles-of-survey-research/chapter-4/slide-144.html"
title: "What Is the Margin of Error?"
type: "lehrbuch-slide"
chapter: 4
chapterTitle: "Sampling"
slide: 144
---

# What Is the Margin of Error?

*"Which sources do you prefer to get your information from?"*

"Which sources do you prefer to get your information from?"

32 % name social media as their main information channel

Sample 48.804 Respondents

Margin of error =

![1 divided by √n](/principles-of-survey-research/media/one_over_sqrt_n.png)

**48.804** respondents in the sample

√48.804 = 220,916 ≈ 221

1 / 221 = **0.0045**

· 100 = **0.45%**

⇒ x = 32% ± 0.45%

⇒ from **31.55%** to **32.45%**

Calculations show approximate values for a 95% confidence level

---

*Slide 144 of 274 · Chapter 4: Sampling · Principles of Survey Research · Dr. Paul Marx*