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SAMPLING - Speech or Presentation Example

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This is because approximately 10% of the students are selected from each of the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively. Here, the population of students is divided into strata that are the Sophomore,…
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SAMPLING
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Extract of sample
"SAMPLING"

Download file to see previous pages Simple random sample? Explain.
This sampling plan results in a random sample, but not a simple random sample. The sample collected is a random sample because every school has the same chance of being selected. The sample is not a simple random sample because no teacher will be selected from schools that were not included in the ten schools selected. In other words, some schools have 100% representation in the sample while some schools have no representation at all.
4. A polling company obtains an alphabetical list of names of voters in a precinct. They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
This sampling plan results in a random sample, but not a simple random sample. This is a case of systematic random sampling. This is a random sample because each person on the list has an equal chance of being selected. This is not a simple random sample because once the first person is selected, the rest of the selections are already determined.
5. The personnel manager at a company wants to investigate job satisfaction among the female employees. One evening after a meeting she talks to all 30 female employees who attended the meeting. Does this sampling plan result in a random sample? Simple random sample? Explain.
No, this sampling plan does not result in a random sample and therefore not a simple random sample. This is a case of convenience sampling, as the personal manager only talks to all 30 female employees who attended the meeting that is whoever happens to be ...Download file to see next pagesRead More
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