Section 3
Sample Surveys
Book
Version 1
By Boundless
By Boundless
Boundless Statistics
Statistics
by Boundless
7 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/17976/raw/electoralcollege1936.jpg)
The Literary Digest Poll
Incorrect polling techniques used during the 1936 presidential election led to the demise of the popular magazine, The Literary Digest.
![Thumbnail](../../../../../../figures.boundless-cdn.com/17965/square/deweytruman12.jpeg)
The Year the Polls Elected Dewey
In the 1948 presidential election, the use of quota sampling led the polls to inaccurately predict that Dewey would defeat Truman.
![Thumbnail](../../../../../../figures.boundless-cdn.com/17967/raw/ome-distribution-1947-2007.jpg)
Using Chance in Survey Work
When conducting a survey, a sample can be chosen by chance or by more methodical methods.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18060/square/tower-25477-150.jpg)
How Well Do Probability Methods Work?
Even when using probability sampling methods, bias can still occur.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18007/square/gallup-portrait.jpeg)
The Gallup Poll
The Gallup Poll is a public opinion poll that conducts surveys in 140 countries around the world.
Telephone Surveys
Telephone surveys can reach a wide range of people very quickly and very inexpensively.
Chance Error and Bias
Chance error and bias are two different forms of error associated with sampling.