Scatter Plots

Front

What is a scatter plot?

Back

A scatter plot is a type of graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional grid.

Front

What does a line of best fit represent in a scatter plot?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions about the relationship between the variables.

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What is the purpose of using a trend line in a scatter plot?

Back

The purpose of using a trend line is to summarize the relationship between the variables and to make predictions based on the data.

Front

How can you determine the line of best fit for a scatter plot?

Back

The line of best fit can be determined by visually inspecting the data points and drawing a line that minimizes the distance from all points to the line.

Front

What is the correlation coefficient?

Back

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

Front

What does it mean if the correlation coefficient is close to -1?

Back

If the correlation coefficient is close to -1, it indicates a strong negative linear relationship between the two variables.

Front

What does it mean if the correlation coefficient is close to 1?

Back

If the correlation coefficient is close to 1, it indicates a strong positive linear relationship between the two variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.