Unit 4: Collecting Data Test Review 1-3

What is the purpose of an observational study?

• To study whether a treatment causes a change in the response

• To observe subjects and measure variables of interest without influencing the responses

• To collect information from a sample to learn about the entire population

• To divide the population into homogeneous groups and choose an SRS from each stratum

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CCSS.HSS.IC.B.3

What is the difference between a statistic and a parameter?

• A statistic describes a population, while a parameter describes a sample

• A statistic is estimated from a parameter, while a parameter is estimated from a statistic

• A statistic is a value that describes a sample, while a parameter is a value that describes a population

• A statistic and a parameter are the same thing

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CCSS.HSS.IC.B.3

Which of the following is an example of an observational study?

• A study where researchers impose treatment on experimental units

• A study where researchers divide the population into homogeneous groups and choose an SRS from each stratum

• A study where researchers observe subjects and measure variables of interest without influencing the responses

• A study where researchers use questionnaires or interviews to collect information from a sample

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CCSS.HSS.IC.B.3

What is a lurking variable in a study?

• A variable that is used to divide the population into homogeneous groups

• a variable that is hidden or not included in an analysis, but impacts the relationship being analyzed

• A variable that cannot be separated or ignored in a study

• A variable that is measured in a natural setting

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CCSS.HSS.ID.C.9

Which of the following is an example of a sample survey?

• A study where researchers impose treatment on experimental units

• A study where researchers divide the population into homogeneous groups and choose an SRS from each stratum

• A study where researchers observe subjects and measure variables of interest without influencing the responses

• A study where researchers use questionnaires or interviews to collect information from a sample

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CCSS.HSS.IC.B.3

What is the advantage of using a random sample in a study?

• It guarantees accurate results

• It eliminates bias in the study

• It ensures that the sample represents the population as best as possible

• It allows every member of a population to have an equal chance of being selected

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CCSS.HSS.IC.B.3

What is the sampling method used in a simple random sample?

• Using technology or a table of random digits to randomly choose members of the population

• Dividing the population into homogeneous groups and choosing an SRS from each stratum

• Choosing a sample based on a rule, such as every 5th customer or the 3rd seat in each row

• Dividing the population into random groups and choosing an SRS of clusters

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CCSS.HSS.IC.B.3

What is the purpose of stratified random sampling?

• To collect information from a sample to learn about the entire population

• To impose treatment on experimental units and study their responses

• To divide the population into homogeneous groups and choose an SRS from each stratum

• To observe subjects and measure variables of interest without influencing the responses

Tags

CCSS.HSS.IC.B.3

What is the sampling method used in a cluster random sample?

• Using technology or a table of random digits to randomly choose members of the population

• Dividing the population into random groups and choosing an SRS of clusters

• Choosing a sample based on a rule, such as every 5th customer or the 3rd seat in each row

• Dividing the population into homogeneous groups and choosing an SRS from each stratum

Tags

CCSS.HSS.IC.B.3

What is bias in a study?

• Using poor questioning methods or wording in a survey

• Choosing a sample that is not representative of the population

• Drawing inferences about a population from a given sample

• Producing inaccurate information that systematically favors one outcome over other outcomes