AP Statistics Semester 1 Review

Front

What is a Census in data collection?

Back

A Census is a method of data collection where information is gathered from every member of the population.

Front

What does the correlation coefficient (r) measure?

Back

The strength and direction of the linear relationship between two quantitative variables.

Front

What does random scatter in a residual plot indicate?

Back

It indicates that a linear model is appropriate for the data.

Front

What does a z-score tell you?

Back

A z-score tells you how many standard deviations away from the mean a score lies.

Front

How do you compare scores from different normal distributions?

Back

You can compare scores by calculating their z-scores.

Front

What is a Simple Random Sample?

Back

A Simple Random Sample is a subset of a population where each member has an equal chance of being selected.

Front

What is a Cluster Random Sample?

Back

A Cluster Random Sample involves dividing the population into clusters and then randomly selecting entire clusters.

Front

What is a Stratified Random Sample?

Back

A Stratified Random Sample involves dividing the population into subgroups (strata) and then randomly sampling from each stratum.

Front

What does it mean if two variables have a strong correlation?

Back

It means that as one variable changes, the other variable tends to change in a predictable way.

Front

What is the mean in a normal distribution?

Back

The mean is the average value of the data set and is the center of the normal distribution.