Regression

Front

What is regression?

Back

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

Front

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.

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.

Front

What does a correlation coefficient of 0 indicate?

Back

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

Front

What is the line of best fit?

Back

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.

Front

What does a negative correlation indicate?

Back

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

Front

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

Back

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.

Front

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

Back

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

Front

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

Back

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

Front

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

Back

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