Statistics and Relationships between Variables(All you need for Unit 2 AP Statistics)

Flashcards covering key vocabulary and concepts related to statistical analysis, focusing on variables and their relationships.

Categorical Variable

A variable that can be divided into groups or categories.

Quantitative Variable

A variable that can be measured numerically and can be either continuous or discrete.

Scatterplot

A graphical representation of two quantitative variables to show their relationship.

Correlation

A measure of the strength and direction of the relationship between two variables.

Causation

The action of causing something; indicating that one event is the result of the occurrence of another event.

Residual

The difference between the observed value and the predicted value in regression analysis.

Regression Line

A line that best fits the data points in a scatterplot, used to predict the value of the dependent variable.

Joint Relative Frequency

The frequency of a specific outcome occurring in relation to the total frequency of the event.

Conditional Relative Frequency

The frequency of an outcome occurring given a certain condition or event.

Intercept

The value of the dependent variable when all independent variables are equal to zero.

Strength of Correlation

A measure that determines the degree to which two variables are related, indicating how closely they move together.

Linear Model

A mathematical model that describes a linear relationship between variables, often represented as a line.

Strength of Direction

Indicates whether the relationship between two variables is positive, negative, or nonexistent.

Two-Way Table

A statistical table that displays the frequency distribution of variables.

Slope

The rate of change of the dependent variable with respect to the independent variable in a linear model.

Correlation formula

slope for LSRL

r(correlation) * (S.D of y/ S.D of x)