Math 3 - Statistics

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What is a sample in statistics?

Back

A sample is a small portion of the population used to gather data from.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What does it mean for a sample to be representative of the population?

Back

It means that the sample accurately reflects the characteristics of the larger population.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is the margin of error in a survey?

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The margin of error indicates the range within which the true value is likely to fall, based on the sample data.

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CCSS.HSS.IC.B.4

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What is the interval of values in which the truth is likely found if 89% of 400 adults pay their bills on time with a margin of error of 2%?

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87% - 91%.

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CCSS.HSS.IC.B.4

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What is the key distinction between well-designed experiments and observational studies?

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An experiment can show a direct cause-and-effect relationship, whereas an observational study cannot.

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CCSS.HSS.IC.B.3

Front

What are the types of unbiased samples?

Back

Cluster, stratified, simple random, systematic, and proportional.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a systematic sampling method?

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A systematic sampling method involves selecting every nth individual from a list or sequence.

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CCSS.HSS.IC.B.3

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What is a convenience sample?

Back

A convenience sample is a type of non-probability sampling where the sample is taken from a group that is easy to reach.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is a biased sample?

Back

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

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is the purpose of random sampling?

Back

The purpose of random sampling is to ensure that every individual has an equal chance of being selected, reducing bias.

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CCSS.HSS.IC.B.3