8.02 Data Analysis

Front

What is a population in data analysis?

Back

The entire group of individuals or instances about whom we hope to learn, e.g., all shoppers in a mall.

Front

What is a sample in data analysis?

Back

A subset of the population selected for observation and analysis, e.g., the shoppers who were asked their preferences.

Front

What does it mean for a study to be biased?

Back

A study is biased if it systematically favors certain outcomes over others, leading to inaccurate conclusions.

Front

What does it mean for a study to be unbiased?

Back

A study is unbiased if it fairly represents the population, allowing for accurate conclusions.

Front

What is random sampling?

Back

A sampling method where each member of the population has an equal chance of being selected.

Front

What is convenience sampling?

Back

A sampling method that involves selecting individuals who are easiest to reach, which may lead to bias.

Front

What is stratified sampling?

Back

A sampling method that involves dividing the population into subgroups and randomly selecting from each subgroup.

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What is systematic sampling?

Back

A sampling method where you select every nth individual from a list of the population.

Front

What is a survey?

Back

A method of collecting data by asking questions to a group of people.

Front

What is sampling error?

Back

The error that occurs when a sample does not accurately represent the population.