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Chapter 4 · Sampling · Slide 138/274

A survey result — and how certain is it?

name social media as their main information channel.

4.4 · Sample Size From result to the question of precision

A survey result — and how certain is it?


“Which sources do you prefer for obtaining your information?” (n = 48,804)
Social media32 %
Search engines24 %
News apps & online portals18 %
Television12 %
Friends & acquaintances9 %
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.

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