Samples and Margin of Error

Front

What is the formula to calculate the percentage of a part compared to the whole?

Back

Percentage = (Part / Whole) * 100

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group.

Front

What is margin of error in survey results?

Back

Margin of error is a measure of the uncertainty in survey results, indicating the range within which the true value is expected to fall.

Front

How do you calculate the margin of error for a survey?

Back

Margin of error = (Critical value) * (Standard deviation / √n), where n is the sample size.

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Front

What is a biased sample?

Back

A biased sample is one that does not accurately represent the population, often due to non-random selection.

Front

What is systematic sampling?

Back

Systematic sampling involves selecting every k-th individual from a list or sequence.

Front

What is convenience sampling?

Back

Convenience sampling involves selecting individuals who are easiest to reach, which may lead to bias.

Front

What is self-selected sampling?

Back

Self-selected sampling occurs when individuals volunteer to participate in a survey or study.

Front

What is the significance of a sample size in surveys?

Back

A larger sample size generally leads to more reliable results and a smaller margin of error.