Regression Models

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What is a regression model?

Back

A regression model is a statistical method used to determine the relationship between a dependent variable and one or more independent variables.

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What is the purpose of a line of best fit?

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The line of best fit is used to summarize the relationship between variables in a scatter plot, helping to predict values.

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What is a quadratic regression?

Back

Quadratic regression is a type of regression analysis where the relationship between the independent variable and the dependent variable is modeled as a second-degree polynomial.

Front

What does the equation of a quadratic regression look like?

Back

Front

What is a linear regression?

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Linear regression is a statistical method that models the relationship between two variables by fitting a linear equation to observed data.

Front

What does the equation of a linear regression look like?

Back

Front

How do you interpret the slope in a linear regression?

Back

The slope indicates the change in the dependent variable for a one-unit change in the independent variable.

Front

What is the significance of the y-intercept in a regression equation?

Back

The y-intercept is the value of the dependent variable when the independent variable is zero.

Front

What is a scatter plot?

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A scatter plot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does it mean if a scatter plot shows a positive correlation?

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A positive correlation means that as one variable increases, the other variable also tends to increase.