In Exercises 9–20, identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster.UFO Poll 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.

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Asked Dec 17, 2019
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In Exercises 9–20, identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster.

UFO Poll 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.

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Expert Answer

Step 1

Simple random sampling:

If a sample of n subjects is selected and every unit in the population has the equal chance of being selected into the considered sample, then it is termed as simple random sampling.

Systematic sampling:

Systematic sampling involves of first considering a starting point for selecting the sample and then selecting every  unit in the population.

Convenience sampling:

The convenience sampling is taken by using the subjects that are easily available to be considered into the sample.

Stratified s...

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