AP Stats Chapter 4

Front

What is random sampling?

Back

Random sampling is a technique where each member of a population has an equal chance of being selected, ensuring that the sample represents the population accurately.

Front

Why is a sample biased if it doesn't include all relevant groups?

Back

A sample is biased if it doesn't include all relevant groups because it may not accurately reflect the opinions or characteristics of the entire population.

Front

What is a control group in an experiment?

Back

A control group is the group of subjects in a trial that do not receive any treatment, allowing for comparison against the treatment group.

Front

What does it mean for a sample to be unbiased?

Back

An unbiased sample accurately represents the population from which it is drawn, without favoritism or systematic error.

Front

What is convenience sampling?

Back

Convenience sampling is a non-random sampling method where subjects are selected based on their easy availability and proximity to the researcher.

Front

What is the difference between a treatment group and a control group?

Back

The treatment group receives the treatment or intervention being tested, while the control group does not receive the treatment.

Front

What is the purpose of random sampling in surveys?

Back

The purpose of random sampling in surveys is to ensure that every individual has an equal chance of being selected, which helps to eliminate bias.

Front

What is a biased sample?

Back

A biased sample is one that does not accurately represent the population, often due to the method of selection.

Front

What is the significance of sample size in statistical studies?

Back

Sample size is significant because larger samples tend to provide more reliable estimates of the population parameters and reduce sampling error.

Front

What is stratified sampling?

Back

Stratified sampling is a method where the population is divided into subgroups (strata) and random samples are taken from each stratum.