In a Kelton Research poll, 1114 Americans 18 years of age or older were called after their

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In a Kelton Research poll, 1114 Americans 18 years of age or older were called after their telephone numbers were randomly generated by a computer, and 36% of the respondents said that they believe in the existence of UFOs.


Identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster.

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