AP Stats Semester 1 Review

Front

What is a discrete variable?

Back

A quantitative variable that takes on a fixed set of possible values with gaps between them.

Front

What does a segmented bar graph represent?

Back

It shows the proportion of different categories within a whole, often used to compare groups.

Front

What is the 1.5 IQR rule?

Back

A method to identify outliers in a data set by calculating the interquartile range (IQR) and determining if any values fall below Q1 - 1.5*IQR or above Q3 + 1.5*IQR.

Front

What is correlation?

Back

A statistical measure that describes the strength and direction of a relationship between two variables.

Front

What is a response variable?

Back

The outcome or dependent variable that is measured in a study.

Front

What is an outlier?

Back

A data point that differs significantly from other observations in a dataset.

Front

What does it mean when correlation has no units?

Back

It indicates that correlation is a standardized measure and does not depend on the units of the variables being compared.

Front

What is the difference between a response variable and an explanatory variable?

Back

The response variable is the outcome being measured, while the explanatory variable is the one that is manipulated or categorized to observe its effect.

Front

How do you determine if a number is an outlier using the IQR method?

Back

Calculate the IQR, then find the lower and upper bounds using Q1 - 1.5*IQR and Q3 + 1.5*IQR. Any number outside these bounds is an outlier.

Front

What is the purpose of a bar graph?

Back

To visually represent categorical data with rectangular bars, where the length of each bar is proportional to the value it represents.