Regression

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What is regression?

Back

Regression 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 strong positive correlation indicate?

Back

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

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CCSS.HSS.ID.B.5

Front

What is a correlation coefficient?

Back

A correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

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CCSS.HSS.ID.C.8

Front

What does a correlation coefficient of 0 indicate?

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A correlation coefficient of 0 indicates no correlation between the two variables.

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CCSS.HSS.ID.B.5

Front

What is the line of best fit?

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The line of best fit is a straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

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CCSS.8.EE.B.5

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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.

Tags

CCSS.HSS.ID.B.5

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What is the formula for the correlation coefficient (r)?

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The formula for the correlation coefficient (r) is r = (nΣxy - ΣxΣy) / √[(nΣx² - (Σx)²)(nΣy² - (Σy)²)], where n is the number of data points.

Tags

CCSS.HSS.ID.C.8

Front

What is the significance of a correlation coefficient of -0.89?

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A correlation coefficient of -0.89 indicates a strong negative relationship between the two variables.

Tags

CCSS.HSS.ID.B.5

Front

What type of relationship does a scatter plot with points forming a straight line indicate?

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A scatter plot with points forming a straight line indicates a linear relationship between the variables.

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CCSS.8.F.A.3

Front

What does a weak positive correlation look like on a scatter plot?

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A weak positive correlation on a scatter plot shows points that are loosely clustered around an upward sloping line.

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CCSS.HSS.ID.B.5