Concept
Version 11
Created by Boundless
Sampling Techniques
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Normal Distribution Curve
The normal distribution curve can help indicate if the results of a survey are significant and what the margin of error may be.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"The Normal Distribution."
http://en.wikipedia.org/wiki/File:The_Normal_Distribution.svg
Wikipedia
Public domain.