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Selection Bias

Selection Bias

Author: Ryan Backman

This lesson will explain selection bias.

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Notes on "Selection Bias"

Terms to Know

Selection Bias

A type of bias that occurs when some groups in the population are left out of the process of choosing the sample.

Random Digit Dialing

A method of selecting a sample for a telephone survey that involves the generation of random telephone numbers.

Terms to Know
Random Digit Dialing

A method of contacting people on the phone. Random numbers are dialed, so this allows researchers to sample people with unlisted phone numbers.

Selection Bias

A bias that results from systematically excluding certain subsets of the population from the sample. It is not necessarily intentional.