Statistical Studies

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What is the definition of a population in statistics?

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A population is an entire set of items or individuals from which data are collected.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What research method involves studying subjects in their natural environment without interference?

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Observational study.

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What are confounding variables?

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Confounding variables are variables that can potentially distort the relationship between the treatment and the results.

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CCSS.HSS.IC.B.3

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What is sample bias?

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Sample bias is an error that occurs when a sample does not represent the population.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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Why is it important to include the target population in a sample?

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Including the target population ensures that the sample accurately reflects the characteristics and preferences of the entire group.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is the difference between a sample and a population?

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A sample is a subset of a population used to represent the whole, while a population includes all items or individuals of interest.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is the purpose of random sampling in research?

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Random sampling aims to eliminate bias and ensure that every individual has an equal chance of being selected.

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CCSS.HSS.IC.B.3

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What is a variable in the context of statistical studies?

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A variable is any characteristic, number, or quantity that can be measured or counted.

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CCSS.6.SP.B.5B

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What is the significance of using control groups in experiments?

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Control groups help to isolate the effect of the treatment by providing a baseline for comparison.

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What is the role of hypothesis testing in statistical studies?

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Hypothesis testing is used to determine whether there is enough evidence to reject a null hypothesis.