Population and Samples

Front

What is a sample?

Back

A sample is a part of a group being surveyed.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a population in statistics?

Back

A population is the entire group of individuals or items that we want to learn about.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is a random sample?

Back

A random sample is a subset of a population where each member has an equal chance of being selected.

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CCSS.HSS.IC.B.3

Front

What is the difference between a population and a sample?

Back

A population includes all members of a specified group, while a sample is a smaller group selected from the population.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is a biased sample?

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A biased sample is one that does not accurately represent the population, leading to skewed results.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

How can you obtain an unbiased sample?

Back

An unbiased sample can be obtained by using random selection methods.

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CCSS.HSS.IC.B.3

Front

What is the purpose of sampling in research?

Back

The purpose of sampling is to gather data and make inferences about a population without surveying every individual.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

If a manager samples every fifth person in line, what type of sampling is this?

Back

This is an example of systematic sampling.

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CCSS.HSS.IC.B.3

Front

What is a representative sample?

Back

A representative sample accurately reflects the characteristics of the population from which it is drawn.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

How do you calculate the expected number of mispriced items in a store?

Back

To calculate the expected number, use the proportion of mispriced items found in the sample and apply it to the total population.

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CCSS.7.SP.A.2