AP Statistics Semester 1 Review

Front

What is systematic random sampling?

Back

A method of sampling where every nth individual is selected from a list or sequence.

Front

What is a z-score?

Back

A statistical measurement that describes a value's relation to the mean of a group of values, expressed in terms of standard deviations.

Front

What is a census in data collection?

Back

A method where data is collected from every member of the population.

Front

What is the formula for calculating a z-score?

Back

Z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

Front

What does a z-score of +1.25 indicate?

Back

The score is 1.25 standard deviations above the mean.

Front

What is the probability of selecting a junior or senior if 35% are freshmen and 30% are sophomores?

Back

35%.

Front

What is the difference between a simple random sample and a stratified random sample?

Back

A simple random sample is selected randomly from the entire population, while a stratified random sample divides the population into subgroups and samples from each.

Front

What is the standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

What is the purpose of using random sampling in statistics?

Back

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

Front

What is cluster sampling?

Back

A sampling technique where the population is divided into clusters, and entire clusters are randomly selected.