Samples and Margin of Error

Front

What does SRS stand for?

Back

Simple Random Sample

Front

What is the margin of error?

Back

The margin of error is a measure of the uncertainty in survey results, indicating the range within which the true population parameter is expected to fall.

Front

How do you calculate the confidence interval using margin of error?

Back

Confidence Interval = Sample Proportion ± Margin of Error.

Front

What is a population in statistics?

Back

A population is the entire group of individuals or instances about whom we hope to learn.

Front

What is a sample in statistics?

Back

A sample is a subset of the population selected for analysis.

Front

How do we reduce variability in survey results?

Back

Increase sample size.

Front

What is the purpose of random sampling?

Back

To ensure that every individual has an equal chance of being selected, which helps to eliminate bias.

Front

What is the significance of a 95% confidence level?

Back

A 95% confidence level means that if we were to conduct the survey multiple times, 95% of the confidence intervals calculated would contain the true population parameter.

Front

If a survey reports 80% with a margin of error of 5%, what is the confidence interval?

Back

75% - 85%.

Front

What does it mean if a survey has a margin of error of 2%?

Back

It means that the true population parameter is expected to fall within 2 percentage points of the reported statistic.