Regressions

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What is regression analysis?

Back

Regression analysis is a statistical method used to determine the relationship between a dependent variable and one or more independent variables.

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What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

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What is a linear regression model?

Back

A linear regression model is a type of regression analysis that models the relationship between two variables by fitting a linear equation to the observed data.

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What is the formula for a linear regression line?

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The formula for a linear regression line is y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the purpose of the slope in a regression equation?

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.

Front

What is the y-intercept in a regression equation?

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

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What is an exponential regression model?

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An exponential regression model is used to model data that grows or decays at a constant percentage rate.

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What is a quadratic regression model?

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A quadratic regression model is a type of regression analysis that models the relationship between variables using a quadratic equation (y = ax^2 + bx + c).

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What does 'no correlation' mean in a scatterplot?

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'No correlation' means that there is no discernible relationship between the two variables being analyzed.