CW Prob&Stat 3.5-3.9 Review

Front

What is a voluntary response sample?

Back

A type of sampling where individuals choose to participate, often leading to bias as those with strong opinions are more likely to respond.

Front

What is response bias?

Back

A type of bias that occurs when respondents answer questions inaccurately due to the way questions are phrased or due to social pressure.

Front

What is undercoverage bias?

Back

A bias that occurs when some members of the population are inadequately represented in the sample.

Front

What is nonresponse bias?

Back

A bias that occurs when individuals selected for the sample do not respond, potentially skewing results.

Front

What is a confounding variable?

Back

A variable whose effect on a response variable cannot be distinguished from other variables in the experiment.

Front

Why is it important to avoid bias in surveys?

Back

To ensure that the results are representative of the population and that conclusions drawn are valid.

Front

What is the difference between a response variable and an explanatory variable?

Back

The response variable is what is being measured, while the explanatory variable is what is being manipulated or changed.

Front

What is the significance of testing a survey on a small group before full administration?

Back

It helps identify potential biases and issues in the survey design, improving the reliability of the results.

Front

What is the impact of wording in survey questions?

Back

Wording can lead to response bias by influencing how respondents interpret and answer the questions.

Front

What is the purpose of random sampling?

Back

To ensure that every individual in the population has an equal chance of being selected, reducing bias.