Unit 8 NC Math 3 Statistics

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected, reducing bias and increasing representativeness.

Front

Why is reducing bias important in sampling?

Back

Reducing bias is crucial because it increases the likelihood that the sample accurately reflects the population, leading to more valid inferences.

Front

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

Back

A representative sample accurately reflects the characteristics of the population from which it is drawn, allowing for valid generalizations.

Front

What is the significance of sample size in statistical studies?

Back

Larger sample sizes generally lead to more reliable estimates and reduce the margin of error, making the results more trustworthy.

Front

What is a potential issue with small sample sizes?

Back

Small sample sizes may not capture the diversity of the population, leading to inaccurate conclusions.

Front

What is the difference between a sample and a population?

Back

A population includes all members of a specified group, while a sample is a subset of that population used for analysis.

Front

What is a survey?

Back

A survey is a method of collecting data by asking people questions to gather information about their opinions, behaviors, or characteristics.

Front

What is the role of random selection in surveys?

Back

Random selection helps ensure that every individual in the population has an equal chance of being included, which enhances the validity of the survey results.

Front

What is a limitation of using volunteers in research studies?

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Using volunteers can introduce bias, as those who choose to participate may have different characteristics or motivations than those who do not.

Front

What does it mean for data to be collected anonymously?

Back

Anonymous data collection means that the identities of participants are not known, which can encourage honest responses but may limit follow-up.