Bias and Sampling Methods

Front

What is a representative sample?

Back

A representative sample accurately reflects the characteristics of the population from which it is drawn, allowing for valid conclusions to be made about the entire group.

Front

What is random sampling?

Back

Random sampling is a method where each member of a population has an equal chance of being selected, reducing bias and ensuring a more accurate representation.

Front

Define voluntary response bias.

Back

Voluntary response bias occurs when individuals choose to participate in a survey or study, often leading to a sample that reflects only those with strong opinions.

Front

What is undercoverage in sampling?

Back

Undercoverage happens when some members of the population are inadequately represented in the sample, leading to biased results.

Front

Explain convenience sampling.

Back

Convenience sampling involves selecting individuals who are easiest to reach, which may not represent the entire population and can introduce bias.

Front

What is response bias?

Back

Response bias occurs when participants provide inaccurate answers due to various factors, such as misunderstanding the question or social desirability.

Front

What is systematic sampling?

Back

Systematic sampling involves selecting every nth individual from a list or sequence, providing a structured approach to sampling.

Front

How does sample size affect the reliability of results?

Back

Larger sample sizes generally lead to more reliable results, as they better represent the population and reduce the impact of outliers.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities, while quantitative data involves numerical values that can be measured and analyzed statistically.

Front

What is a sampling frame?

Back

A sampling frame is a list or database from which a sample is drawn, representing the population of interest.