Scatterplot & LSRL Review

Front

What is a scatterplot?

Back

A scatterplot is a type of data visualization that displays the relationship between two numerical variables.

Front

What are the two variables represented on a scatterplot?

Back

Independent variable and dependent variable.

Front

What does the correlation coefficient indicate?

Back

The correlation coefficient indicates the strength and direction of a linear relationship between two variables.

Front

What is the range of the correlation coefficient?

Back

The correlation coefficient ranges from -1 to 1.

Front

What does a correlation coefficient of 0.99 indicate?

Back

A correlation coefficient of 0.99 indicates a very strong positive linear relationship between the two variables.

Front

What is the least squares regression line (LSRL)?

Back

The least squares regression line (LSRL) is a line that best fits the data points in a scatterplot, minimizing the sum of the squares of the vertical distances of the points from the line.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you interpret the slope of the LSRL?

Back

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

Front

What does a negative correlation coefficient indicate?

Back

A negative correlation coefficient indicates an inverse relationship between the two variables.

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually assess the relationship between two quantitative variables.