Questions and Answers
What is the population in the study of college freshmen at AU?
college freshman at AU
What is the sample in the study of college freshmen at AU?
freshmen declaring a biology major
If we were to find out which classes each freshman at AU were taking by email, the information we would obtain would be a ____?
parameter
The info we would obtain from emailing only the AU freshmen who have declared a biology major would be a ____?
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If students were divided into grade levels and then 25 students were randomly chosen from each grade, what type of sampling is this?
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If the investigator chose to interview 25 students from only 9th and 11th grade classes, what type of sampling is this?
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What type of sampling is used when a researcher picks a starting number and an interval from a population?
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When performing an oral cancer screening of all the residents of Shadow Oaks Nursing Home, what type of sampling is used?
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What type of sampling is used when a number is assigned to 50 people and 10 are randomly drawn?
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What sampling technique is used when a psychology professor requires students to participate in an experiment?
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What sampling technique is used when a principal selects three sets of parents from each grade level and asks them to fill out a questionnaire?
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What sampling technique is used when a reporter picks the first three people who appear informed about the news?
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What sampling technique is used when a principal selects three of twelve teachers across grades to survey?
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What sampling technique is used when a principal selects three grades to interview randomly three teachers from each?
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What sampling technique is used when a principal interviews three teachers from each grade level?
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What sampling technique involves assigning numbers to teachers and selecting based on lottery numbers?
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When a principal interviews every tenth teacher, what sampling technique is used?
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What sampling technique is used when Nick Henry randomly selects five departments and interviews all faculty members in those departments?
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Study Notes
Population and Sample
- Population refers to all college freshmen attending AU.
- Sample consists of freshmen who have declared a biology major.
Parameters vs. Statistics
- A parameter represents data for the entire population (e.g., classes all freshmen are taking).
- A statistic reflects data from a subset of the population (e.g., classes biology majors are taking).
Sampling Techniques
- Stratified random sampling: Dividing a population into subgroups (e.g., grade levels) and randomly selecting individuals from each.
- Cluster sampling: Selecting entire groups or clusters (e.g., specific grade classes) for data collection.
- Systematic sampling: Selecting every nth individual from a list after randomly choosing a starting point.
- Convenience sampling: Choosing subjects based on ease of access rather than random selection (e.g., all residents of a specific nursing home).
- Simple random sampling: Each individual has an equal chance of being chosen (e.g., drawing numbers from a hat).
- Judgement sampling: Selecting individuals based on the researcher’s criteria or opinion (e.g., people who seem informed about news).
Application of Sampling Techniques
- Convenience sampling is evident in studies where participants are chosen based on availability (e.g., psychology class requirement).
- Stratified random sampling is used where specific subgroups are intentionally selected for questionnaires or surveys.
- Cluster sampling is applied when selecting groups within a population, like teachers from certain grade levels.
- Systematic sampling uses a fixed interval to choose subjects from a list.
- Judgement sampling involves a subjective selection process based on the researcher’s perspective.
Research Examples
- A principal selecting parents from each grade level for feedback utilizes stratified sampling.
- A principal conducting teacher interviews by grade level represents cluster sampling.
- Randomly interviewing departments for faculty input shows cluster sampling in practice.
- Assigning numbers to individuals and using a lottery method exemplifies simple random sampling.
Final Insights
- Sampling methods greatly influence the reliability and validity of research outcomes.
- Properly understanding different sampling techniques helps ensure appropriately representative data is collected.
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Description
This quiz focuses on sampling and populations within research methodologies, specifically targeting college freshmen at AU. It includes questions and definitions that help clarify concepts related to studying specific groups in research. Ideal for students looking to understand sampling techniques in a practical context.
