Recall the description of the political poll taken by Literary Digest about the Landon vs. Roosevelt election. This is an example of a potential error that can be made when doing survey research involving political polls. What is the lesson that survey researchers learned from this error?

An incorrect sample frame can destroy a study, regardless of the sample size.

Explanation:

There are major three known errors that were detected during the survey research of the political poll taken by Literary Digest about the Landon vs Roosevelt election.

These errors were

* Sampling error-- The telephone directories, automobiles that were sampled, were mostly sampled middle/upper class

* Timing -- The questionnaires were mailed in early September, they did not measure the changes in public opinions as the election drew closer.

* Self-selection-- It should be understood that an individual cannot select himself/herself into a sample. This is because,the more wealthy and educated do that so the results are entirely accurate

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